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Posts for: GrahamO
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Feb 21, 2019 16:56:59   #
Streets wrote:
You might get close to equalling a 100 MP full frame sensor IF you have a Rollei 2.8 Planar equipped camera shooting Microfile film and have a perfectly registered printer capable of 1200 lines/mm.


Thank you for taking my bait and providing a scientific dissertation.
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Feb 21, 2019 15:26:22   #
wrangler5 wrote:
I preferred my Rolleis to Hasselblad (largely because I couldn't afford Hasselblad lenses, and for an 80mm-lens-only camera I found the Rollei to be more convenient to use, especially the 2.8F with its coupled meter.) It would be wonderful to see a real digital TLR with medium format sensor, but the market for one would probably be so tiny that even NASA would have to think about the price.


I don’t think a square format digital will ever be made but that doesn’t prevent me getting out my TLR Rolleis and shooting film from time to time and scanning with an Epson V700. Just guessing but that might be equivalent to a 100mp sensor. I expect someone will correct me on that last point with a scientific dissertation.
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Feb 21, 2019 15:03:42   #
Leitz wrote:
I'm not bold enough to admit to some of the experiments I've done!


Leitz, then you will be familiar with nonsense
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Feb 21, 2019 14:56:18   #
Kingman wrote:
I will have to go back and check my negatives/slides of the time...I have an image of him and myself at a shoot. I also remember vividly of his critique of my images. I brought both my own freelance work and my scientific work from my "day job" at the time. He was intrigued by both!


I had bought and read all of his instructional books that I could find. His photos made me want to visit Yosemite and at last about 4 years ago we did as part of a road trip right around Northern California and more. Not long enough in Yosemite but of course I visited the Ansel Adams gallery. ( I live in New Zealand but I’m not always there)
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Feb 21, 2019 13:45:27   #
Kingman wrote:
I really miss having my sessions and conversations with Ansel Adams when I was younger. Met him many times and took courses from him, and a follower of his Zone V method. Once at a course in Monterey, CA he invited us all to his house for "drinks" at 6 PM. We were told at the time that "he never did this" but he made a connection with our group. The thing was that 6 PM was dinner time where we were staying at a conference center. Food was included at the conference center as part of the week long course. Many were on shoe string budgets and debated, "food or drink at Ansel's house". Ansel's house won out. We arrived at his house and had full run of his gorgeous house overlooking the Pacific Ocean, his infamous darkroom, his gallery and he had the the full open bar as promised and a complete spread of food for us! We all had pleasant conversations and great time that evening with him while he sat in his favorite chair under his epic image of Half Dome. A memory I will forever cherish as a photographer forever.
I really miss having my sessions and conversations... (show quote)


Very lucky you. Did you by any chance think of taking a photo of him sitting in his favourite chair under his epic image of Half Dome?
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Feb 21, 2019 13:36:14   #
mikedent wrote:
Is such a lens available, esp for Nikon mount? All the ones I have seen are at least f4. Want to duplicate the classic 24-70 f2.8 but with more reach. Thanks.


Use a Nikon 135mm f2 prime lens or a Sigma 135mm f1.8 prime in addition to your 24 / 70 f2.8 zoom.
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Feb 21, 2019 13:02:08   #
Leitz wrote:
Putting in my half pence worth here, I agree that without more information from the OP any response is guesswork. Describing how to mount a lens is foolish if he already has a bellows with camera and lens mounted, and he's surely confused if he tried to follow the advice on how to focus! I also recommend that he check the links in the macro section for factual information and ignore all the nonsense posted here.


Leitz, Yes there is nonsense written here, and the nonsense is not what I wrote about when I very successfully adapted an enlarger lens. Perhaps I was foolish in experimenting but it worked beautifully and I took some very good photos that way. No animals were injured. Absolutely nothing exploded or overheated.
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Feb 21, 2019 03:44:14   #
llhmontana wrote:
Does anyone know how to use enlarger lenses for macro photography on a bellows.


A long time ago I epoxy glued a thin Asahi Pentax extension tube to the back of a 105 mm enlarger lens. I screwed mounted that on a Pentax thread mount accessory close up bellows. Make sure the lens will be in the correct orientation to read the aperture when it’s mounted. It worked extremely well from infinity to very close up. That was film of course and I was using an Asahi Pentax S1. Open the aperture to focus, then stop down to take, just as with an enlarger. Longer enlarger lenses are best if you do this. 50mm is too short. You can modify most mounts with epoxy glue and thin extension tubes, although now you can buy some lens adapters, but possibly not for enlarger lenses. You could likely use a plastic, camera body cap, with the centre cut out instead of an extension tube. This method would work just as well with digital. Use a tripod of course, mounted on the bellows.
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Feb 20, 2019 03:46:32   #
Wingpilot wrote:
You have been shooting with a Canon for a long time, now, and you're used to the system and are familiar with it. You also have two good lenses. If you want to upgrade your camera body, given that you like to shoot sports and other action photography, I have to second the recommendation of upgrading to an 80D. It's fast and very capable. And all you'll need is the body since you already have lenses. I'd say stick with Canon, otherwise you'll end up spending a lot of time trying to learn a new system, such as Sony. Also, if you are interested in the possiblity of going mirrorless, Canon just came out with two good full frame mirrorless cameras, both of which come with an adapter so you can still use the lenses you already have. But I would still recommend the 80D.
You have been shooting with a Canon for a long tim... (show quote)


I have the 5D4 and the 80D. Apart from the obvious differences in crop factor and other details, most of the time there is no discernible difference in final results. The 5D4 is “better” but only in the extreme situations of low light or maybe wide angle. And the 80D is only slightly “better” than the posters existing camera.
I agree about sticking with Canon, as that’s what you are already using.
ALL the cameras and lenses we use today are far more capable than cameras used by legendary photographers such as Henri Cartier Bresson. So what is different? What’s different is us. We all need to learn to take better photos. We need to look at books of classic photos and art galleries. Edward Weston, Ansel Adams, Henri Cartier Bresson, Ernst Hass, Bill Brant etc etc. All those famous VN war photographers who all used Nikon F (I owned a couple) with TriX film. We have far better gear than they had. A new camera won’t take better photos, but we can with practice. I once filmed a TV story about a guy who took incredible photos with a box Brownie. Spend your money, if you have excess, by traveling to new interesting stimulating places and take along your old camera.
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Feb 18, 2019 22:06:16   #
JD750 wrote:
Ok in answer to your question, it is not cheap, but I would probably take a good look at Capture One.

There were not as many choices when I switched in 2014, I tired several, and I narrowed it down to, the Adobe Photographers plan which was LR + PS and Bridge at the time, and Capture One Pro 7. I tried both for a year. I really liked the crisp raw rendering results of Capture One. I got results I liked, more "punch" but not excessive, faster with less effort than with PS or LR.

But in the end I liked what Adobe was doing with it's business model, the "Cloud", pushing out real time updates, over the internet. No waiting months for a major release. They offered LR for light editing and cataloging, and PS for heavy lifting. I had used PS Elements prior to adapting Aperture, so I had some familiarity with "Photoshop Lite", but I could never justify the price. Now PS itself was included in the Photographers Plan. My new at the time Camera was quickly supported by Adobe, but not by Phase One. I was advised I would have had to buy the next version to get raw support. That rubbed me a little raw. ;) So at the end of a year I went with Adobe. The price is still the same now as it was when I started. And they have added a lot of features, LR CC, Mobile Apps, the Portfolio. I'm a happy customer.

Aperture is still the best for organizing/cataloging/keywords. RIP.
Ok in answer to your question, it is not cheap, bu... (show quote)


Thank you JD750.
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Feb 18, 2019 15:59:36   #
amfoto1 wrote:
This is incorrect.

f/2.8 is f/2.8 as far as EXPOSURE is concerned, regardless of whether the lens is used on a crop sensor camera or full frame camera. There is no "light loss" with zooms, any more than there is with primes. f/2.8 on a prime delivers the same light to a sensor as f/2.8 on a zoom. Plus, today's zooms are optically much better than those of the past. The best zooms now approach the image quality and distortion correction of prime lenses, while most lenses and/or post processing software programs are able to easily correct for any vignetting and chromatic aberrations that might occur. In fact, image quality concerns are less is especially true when using a full frame-design lens on an APS-C camera, which crops away the periphery of the image where vignetting and most CA occur, utilizing only the central best and sharpest part of the image rendered by most lenses. (Plus the original poster appears to be using a Canon 70-200mm f/2.8 lens... which could well be one that uses a fluorite element to largely eliminate CA. Over the years, two of Canon's four different 70-200/2.8 models have used fluorite. All three of their 70-200 f/4 lenses have used it.)

When sites like DXO (and people like Tony Northrup) refer to a lens "acting more like an f/3.5 or f/4 than like f/2.8", they are talking about how the lens renders DEPTH OF FIELD when it's used on an APS-C camera, compared to how it does on full frame. They ARE NOT referring to light transmission or exposure... which don't change.

Yes, a prime lens can be smaller, lighter, faster and considerably less expensive than a zoom.... it can even be "better corrected". There are very few zooms that have larger than f/2.8 max aperture, while primes with f/2, f/1.8, f/1.4 and even faster are widely available. One of the more extreme examples, a zoom including the 50mm focal length such as a 17-55mm f/2.8 costs more than $800, is over 3.25" diameter and 4.5" long, and weighs nearly 4X as much (just under 23 oz.) In comparison, a 50mm f/1.8 lens.... which is over a full stop faster... can be bought for as little as $125, is 2-3/4" diameter, 1.5" long and weighs less than 6 oz.

But as far as exposure is concerned, f/2.8 aperture on ANY lens - be it zoom or prime, wide angle., normal or telephoto, crop only or full frame capable - will deliver the same amount of light to the sensor.

The difference is how the lenses render DoF on different formats... and, even then, it doesn't matter if it's a zoom or a prime. Plus, it's actually an indirect cause of the difference in DoF. The reason "apertures on crop cameras act smaller" is due to the way we use the different formats, not due to any inherent difference in the actual DoF. In other words, a 200mm lens (zoom or prime, doesn't matter) at f/2.8 that's used to photograph an object 25 feet away will render exactly the same DoF, regardless of sensor format. However, that's not what we do. The reason it seems different is because when you put the 200mm lens onto a full frame camera, in order to frame the subject the same way you did with the lens on a cropper, you have to move closer to it with the camera and lens, and this change in distances is what causes the DoF the lens produces at that aperture to appear shallower and out of focus background objects to be more strongly blurred. Instead of moving closer, you could instead use a longer focal length lens on the FF camera... and this also will make any given aperture produce shallower DoF and stronger background blur.

In other words, f/2.8 "not acting like f/2.8" only pertains to how DoF is rendered, not to exposure. And the differences in the way DoF is rendered on different sensor formats is actually due to changes in distance and/or changes in focal length that are done to accommodate the change in sensor format.

For a zoom, f/2.8 is "fast". There are very few zooms that are faster, mostly due to size and cost limitations.

Primes can be faster, while also being smaller, lighter and less expensive. But primes aren't as versatile and convenient as zooms.
This is incorrect. br br f/2.8 is f/2.8 as far as... (show quote)


I’m sorry amfoto1 but what I wrote is NOT incorrect. In film and television lenses are calibrated in both T stops and F stops. T is for “transmission” and is used for setting exposure. F is for “focal” which is used for deciding depth of field. Zoom lenses have the most difference between T and F stops than primes because zooms are usually more complicated with more elements to loose light.

If you look at lenses that are made in both “photography” and “video” versions you will see that the “video” versions of the same basic designs have a T stop of maybe T3.1 and an F stop of maybe F2.8

When you are using your digital camera the built in light meter compensates for this difference but it will usually set a slightly lower shutter speed with an f2.8 zoom than with an f2.8 prime.

Zooms have improved but similar technology advances have also improved primes if you look for example at Sigma Art lenses.

An exception to zooms V primes is the Sigma 18 / 35 f1.8 zoom ( which I own ). It has a T stop of T1.8, just the same as it’s F stop of f1.8 and is very popular for video. But it is only a 2X zoom.
(I was not discussing APSC and Full Frame where of course 2.8 for example is 2.8 on either.)
I own several zooms as well as several primes and the primes have much more light gathering power than zooms.
Below, last night a snapshot at f1.4 with a Sigma 24mm f1.4 Art hand held after dark.


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Feb 18, 2019 15:06:25   #
Gilkar wrote:
Before the digital revolution, I used square format cameras, twin lens reflex and Hasselblads. Now I am using DSLR's and enjoying them. The only thing I find annoying is having to rotate the camera. I own several brackets that allow me to rotate from horizontal to vertical and I certainly can do it manually.
I got to thinking about the good ole days when I owned a "Robot" 35 mm camera. (Yes I am that old!) It was a 35mm square format camera. It was never popular and did not catch on. Later, Kodak brought out it's Instamatic line of square format cameras and films but again they were popular for awhile and then disappeared. Now everything is digital and we have sensors in many varied formats, 2x3, 3x4, full frame etc. I am curious why some enterprising manufacturer hasn't brought out a square format sensor in the 35mm size. (36mm X 36mm) It doesn't appear that it would take much retooling to create and the resulting camera would certainly be less expensive than the large square format digital cameras on the market today. I think the functionality of our present DSLRS and Mirrorless cameras could be retained and at the same time give us square format lovers a camera to enjoy. Any insights or comments, anyone?
Before the digital revolution, I used square forma... (show quote)


The real reason for a square format was found with cameras such as the twin lens reflex Rolleiflex. It is a beautiful simple design that isn’t intended to be turned on its side. The later Hasselblad SLR continued the tradition followed by Bronica etc. The intention was to crop the 2,14” square 120 film negative later in the darkroom and to produce 8X10, 6X4, 12X10, 16X20 or whatever standard aspect ratio prints were required in either vertical or horizontal format. The then popular 8X10” print size is quite close to square, but the intention was not necessarily to produce square prints.This way of working was promoted by Rolleiflex along with the ability to crop the large negative even more tightly
I would buy a digital equivalent of the Rolleiflex TLR in an instant if it were available now as I loved ( and still do with film ) the waist level viewfinder. A digital version wouldn’t need both taking and viewing lenses but there is no reason not to. Using 2 lenses would possibly enable the simple use of a between lens shutter.
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Feb 18, 2019 05:17:10   #
Gilkar wrote:
Before the digital revolution, I used square format cameras, twin lens reflex and Hasselblads. Now I am using DSLR's and enjoying them. The only thing I find annoying is having to rotate the camera. I own several brackets that allow me to rotate from horizontal to vertical and I certainly can do it manually.
I got to thinking about the good ole days when I owned a "Robot" 35 mm camera. (Yes I am that old!) It was a 35mm square format camera. It was never popular and did not catch on. Later, Kodak brought out it's Instamatic line of square format cameras and films but again they were popular for awhile and then disappeared. Now everything is digital and we have sensors in many varied formats, 2x3, 3x4, full frame etc. I am curious why some enterprising manufacturer hasn't brought out a square format sensor in the 35mm size. (36mm X 36mm) It doesn't appear that it would take much retooling to create and the resulting camera would certainly be less expensive than the large square format digital cameras on the market today. I think the functionality of our present DSLRS and Mirrorless cameras could be retained and at the same time give us square format lovers a camera to enjoy. Any insights or comments, anyone?
Before the digital revolution, I used square forma... (show quote)


Yes, easy. Buy a secondhand TLR Rolleiflex and use film, then scan it with an Epson photo scanner. I’ve got 2, a Rolleicord and a Rolleiflex, but I’m not selling. Quite a few other makes around.
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Feb 17, 2019 23:01:49   #
Gene51 wrote:
I agree Graham. I also do the same. But to call that the same as using a shift lens is complete nonsense uttered by a clueless individual. I called it a fake shift, because it isn't a shift at all. At no point do I regard opting to crop and adjust in post processing as anything less than good technique.

I don't use wide lenses for panorama. I find that the volume anamorphosis at the edges and corners problematic for most pano stitching programs, so I usually opt for nothing shorter than a 35mm on full frame.

I used Sinar in my own studio and for my own indoor work. But out in the field I had a lovely Horseman 985, and an odd duck - a Speed Graphic that had some limited rear swing/tilt capability - and the dual illuminated rangefinder focusing system for dark settings which did not require you look into a dark groundglass or rangefinder - you just pointed the camera and adjusted focus until you lined up the two light beams. I really miss that gear, though I do appreciate everything that digital has allowed me to do with my images.
I agree Graham. I also do the same. But to call th... (show quote)


Yes Gene51, I well remember the Speed Graphic. Weegee was the expert back then.


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Feb 17, 2019 21:16:04   #
DelRae wrote:
I also have Canon Lens 24-70/2.8 And 70-200/2.8 I had a t6i I really liked it but wanted to move up so I got the 80D a guy on here kept on telling me to get the 6D mark II well I did not listen to him. so got the 80D was not happy with it that much I call Canon Ask if I could send it back they let me and I order the 6D mark II I love it thank you Chris. I do high School Soccer, Basketball, Volleyball and people really like my pictures. what ever you do dont let people talk you in to taking pictures of their kids way to much work not going to do that next year hope this helps you out
I also have Canon Lens 24-70/2.8 And 70-200/2.8 ... (show quote)


Right DelRae, not worth getting the 80D as a replacement for t6i. Not enough difference. I use my 80D for walking, cycling, boating, (30’ boat so fairly dry) and lightweight compact travel. I recently bought the Sigma 18/35 f1.8 Art (for apsc) and it absolutely transformed the 80D to a new level approaching FF results. I’m not specially recommending the 18/35 as it takes a certain degree of skill to use. No auto focus problems at all but at f1.8 it’s a fine line. I use a lighter weight lens for cycling.
Otherwise I use 5D4 not all that different to your 6D11.
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