Posts for: geezer7
Dec 29, 2017 18:25:32 #
Thank you everyone for responding. The consensus is that distance is the main determinant in whether features are distorted. That makes sense to me.
Dec 29, 2017 15:54:44 #
I apologize if this topic has been covered in other posts. I have often seen comments stating that since the 50mm lens has an equivalent field of view (FOV) to a 75mm lens on a full-frame (FF) Nikon camera it would be a good lens to use on an APS-C camera for portraits. What bothers me is that 50mm lenses on FF cameras are said to produce unflattering features on faces and therefore 80+mm lenses are a better choice for portraits. Since we know that using a 50mm lens on an APS-C camera does not change the focal length to 75mm why wouldn't the unflattering features occur on the APS-C camera. The only difference that I can see is the possibility that the APS-C camera is further away than a FF camera for the same coverage on the sensor. I would be interested in hearing informed opinions on this topic!
Thanks for your time and comments.
Thanks for your time and comments.
Dec 23, 2017 10:22:01 #
GAS496 wrote:
Letâs have some fun and see a thread of our ONE favorite or best photograph of 2017. I will start.
âThe Granaryâ shot near Canyonlands National Park. It is an 8x10 contact print on graded silver gelatin paper.
âThe Granaryâ shot near Canyonlands National Park. It is an 8x10 contact print on graded silver gelatin paper.
This was hand held and so is not very sharp but it was a memorable sight!
Nov 22, 2017 07:46:13 #
I built a PC a couple of years ago and decided to use an SSD as my C drive. I experienced a massive improvement in boot time. Without actual testing my impression is that program start-up time has been reduced. However I am not convinced that with adequate RAM, application performance has been significantly improved. For instance with photo postprocessing, image files probably reside on a mechanical hard drive so no speed improvement will occur with loading images. With adequate RAM most applications will probably be loaded into system memory and not require significant swapping. Just my impressions without significant testing. The startup improvement is great but if one doesn't reboot frequently it may not be that important.
If you often jump from one app to another you'll see some improvement but I don't think you'll experience much speed up while running a post processing app.
If you often jump from one app to another you'll see some improvement but I don't think you'll experience much speed up while running a post processing app.
Nov 19, 2017 14:43:22 #
Glad to help. I'm undecided whether I want the advantages of touch screen vs the possibility of resetting my focus point. I often ended up with a focus point in a corner!
Linda From Maine wrote:
Thanks; I checked and I think that was it! Not only that, I now know that the touch screen allows me to set the focus point more quickly than the arrow keys!
NotAnsel: time for us to find the M4/3 forum I've read about
NotAnsel: time for us to find the M4/3 forum I've read about
Nov 19, 2017 09:17:13 #
Regarding your focus point wandering. I had the same problem with my recently purchased Panasonic GM5 and isolated it to the touch-sensitive screen. I would inadvertently touch the screen and the auto-focus point would move. My alternatives were to live with the inconvenience or turn off the sensitivity. I don't know if there is a better solution.
Linda From Maine wrote:
I had a Canon Rebel T3i for 4+ years. I bought the... (show quote)
Nov 12, 2017 06:45:00 #
While most of us agree that actual focal length doesn't change from crop sensors to full-frame sensors and that light transmitted to the sensor also doesn't change, the DOF does change. A simplified formula for calculating DOF is
DOF = 2 * (Lens_F_number) * (circle_of_confusion) * (subject_distance)^2 / (focal_length)^2
Charts show that the circles of confusion (CoC) for aps-c and full-frame sensors are 0.019mm and 0.029mm respectively. These values are cited in Wikipedia for Nikon aps-c sensors.
Sorry for going mathematical but the formula seems to clear up the confusion about DOF. Pun intended.
Note that CoC varies approximately inversely as the crop factor and that in order to obtain the same DOF for both formats the f-numbers need to change by the crop factor.
More complex formulae are available but the formula above seems to be adequate to explain the difference in DOF.
Hope this helps.
DOF = 2 * (Lens_F_number) * (circle_of_confusion) * (subject_distance)^2 / (focal_length)^2
Charts show that the circles of confusion (CoC) for aps-c and full-frame sensors are 0.019mm and 0.029mm respectively. These values are cited in Wikipedia for Nikon aps-c sensors.
Sorry for going mathematical but the formula seems to clear up the confusion about DOF. Pun intended.
Note that CoC varies approximately inversely as the crop factor and that in order to obtain the same DOF for both formats the f-numbers need to change by the crop factor.
More complex formulae are available but the formula above seems to be adequate to explain the difference in DOF.
Hope this helps.
Nov 5, 2017 17:59:16 #
Robert Bailey wrote:
Geezer7,
That lens is only sharp between f 2.8 and f 8.
Here is the dxomark test report on sharpness (mounted on a D7100).
https://www.dxomark.com/Lenses/Nikon/AF-Nikkor-50mm-f-1.8D-mounted-on-Nikon-D7100---Measurements__865
That lens is only sharp between f 2.8 and f 8.
Here is the dxomark test report on sharpness (mounted on a D7100).
https://www.dxomark.com/Lenses/Nikon/AF-Nikkor-50mm-f-1.8D-mounted-on-Nikon-D7100---Measurements__865
Thanks Robert. That verifies my experience! I don't think I checked the f-stops beyond f11.
Nov 5, 2017 15:13:09 #
Regarding the Nikkor 50mm af1.8d lens, I found mine to be soft at 1.8 but sharp at 4.0. It was better at 2.8 than at 1.8 but not really sharp. I've seen comments supporting my observations. This was on a D7100. Has anyone else had a similar experience?
Sep 14, 2017 15:13:41 #
Chaler wrote:
I've owned an S90 and have now owned an S120 for several years. I love its size, 4x zoom, and general ruggedness. I haven't liked its viewfinding, low light performance, or its af capabilities. I have no particular brand loyalty, and am willing to spend more if necessary.
Given all the above, and wishing to keep the small size, what is recommended (several years have gone by, surely there must be a few better options.)?
Given all the above, and wishing to keep the small size, what is recommended (several years have gone by, surely there must be a few better options.)?
I used the S90 from 2010 to 2016 for travel and bought a D7100 in 2014 for better IQ and longer zoom. However, the D7100 is too bulky for the way my wife and I like to travel (backpacks to carry on airplanes and European travel). Since I wanted to upgrade to a very small camera with better IQ than the S90, I bought a Panasonic GM5 with a 12-32mm lens. Unfortunately Panasonic discontinued the GM5 so it is not available new as far as I know. It has a micro four-thirds sensor and offers pretty good IQ. It also has interchangeable lenses and an electronic view finder. It is very compact with the 12-32mm lens although not as small as the S90. You might investigate the MFT offerings for better IQ than the S120. You do not seem to want super zoom capability so a pancake lens with a 3-4X zoom range could work for you.
Just my input.
Aug 23, 2017 18:02:27 #
The Smoky Mountains are beautiful. There are numerous gorgeous sights both on the road and accessible by hiking. There is a great resource at the Park Headquarters at Sugarlands Visitor Center just outside Gatlinburg. The rangers are very helpful and knowledgeable . There are many books available in their bookstore. We have found the book entitled "Waterfalls of the Smokies" and "Hiking Trails of the Smokies" to be invaluable if you enjoy hiking. Gatlinburg is definitely touristy but has many restaurants that may be within walking distance from your condo. The traffic is pretty heavy but if you can walk it is no problem. Have a great time.
Jun 6, 2017 19:36:34 #
We just visited San Antonia last weekend and enjoyed the Riverwalk and the five missions distributed along the Riverwalk. The Alamo is one of the missions but the others are well worth seeing. I took an m43 camera with a 12-32mm lens and most photos were taken at the 12mm end. I suggest taking the widest angle option. Enjoy the trip.
Feb 19, 2017 10:07:27 #
Plieku69 wrote:
Some one here has to have done it. I plan on taki... (show quote)
My wife and I hiked at RMNP in 2010 and thoroughly enjoyed it. I put together a journal of our days there which you should be able to find at the following link: https://sites.google.com/site/davebrendaleffen/
I had just bought my Canon S90 the previous month so I wasn't used to the camera but you should get an idea of the possibilities available. I don't believe I post processed any of the photos and I don't pretend to be an accomplished photographer.
I would recommend buying a guide to the park. We used "Rocky Mountain National Park Day hiker's guide" by Jerome Malitz. We went there in early September so there was no snow on the ground.
Enjoy the trip it is a beautiful park and my wife and I are talking about returning later this year.
Dave
Feb 12, 2017 11:44:00 #
I thought I should respond to this old topic. I am the OP and bought the Panasonic GM-5 and recently took it to Florida for a month on the beach. I was able to find a compact carrying case, the Lowepro Dashpoint 20 which will hold the camera, a 12-32mm pancake lens and a spare battery and fit on my belt or a strap on my backpack. There is also a pocket in the lid which holds an SD card. All in all I am happy with the choice and used the camera for several long hikes. The IQ is adequate for my purposes and the EVF allows me to hold the camera to my face thus reducing the effects of camera shake. The GM-5 with lens will fit in a pants pocket but it is a tight fit and definitely not for someone who wears skinny jeans! At 72 that is not an issue for me!
Just wanted to thank everyone who responded and to let them know what I concluded.
Just wanted to thank everyone who responded and to let them know what I concluded.
Nov 7, 2016 16:55:40 #
le boecere wrote:
Earlier this year, I went through a similar decisi... (show quote)
Thanks. That is exactly the information I needed. Your comment "the essential go no-go" sums up my situation perfectly. I don't find the D7100 a burden to carry so if I can't find a camera to fit in my pocket that is markedly better than my S90 then I'll stay with what I have and use the S90 for hiking and the D7100 for city-type travel. I have an Optech sling that keeps the D7100 close to my chest without the camera flopping around which I find pretty comfortable.
My choices seem to be the GM5 or some version of the RX100. I'm getting a feeling that the GM5 may not be very pocket friendly? I wish I could find a place to see it. I'm also not thrilled with the red cover on the GM5 but I could live with it!