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Lens Question - 1:4 vs f/1.4
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Jan 24, 2015 08:15:46   #
CO
 
Zone-System-Grandpa wrote:
F1.4 would be the aperture and 1:4 would be zoom ratio.


When there's a colon between the numbers it has to do the the reproduction ratio associated with macro lenses. A 1:1 ratio is object's actual size is recorded on the sensor. 1:2 is half size.

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Jan 24, 2015 08:25:56   #
Zone-System-Grandpa Loc: Springfield, Ohio
 
dardan wrote:
Please be careful what you say if you don't know what you are talking about.

Firstly, there is no such thing as a Nikon 12-24 f/1.4, and secondly, how can a stated 12-24mm lens have a zoom ratio of 1:4?


+++++++++++++++++++++++++++++++++++++
Oh, here we go again ~ another little man with nothing else to do but to lie in wait for someone as myself to post something that can be interpreted in a way whereby the little man can distort that which I've said just so he can jump in to inflate his small man ego while hiding behind his PC acting like a hero with a piss ant brain !

Listen up, hero ~ in the world of photography, when a person refers to a lens having nomenclature such as f1.4, the person is referring to the speed of the lens or the aperture of the lens and when a person is referring to nomenclature such as 1:4, the person most often is speaking of the ratio of magnification in relationship to the latent image's size on the film's plain and or the sensor in a camera compared to the actual size of the subject.

In no way was I suggesting that Nikon makes a lens as the OP had mentioned and the lens have a fast 1.4 aperture nor was I suggesting that Nikon makes a lens as the OP had mentioned with a zoom range ratio of 1:4 !

I suggest that you spend more of your time trying to answer the OP's question and spend less time attempting to defame others and or the posted responses that others have made attempting to help the OP. AND, if you want to impress others, why don't you do or say something that merits impressing others in lieu of your trying to make others look as meaninglessly goofy as are you ! AND, when you were a kid, were you a hall monitor or did you spend most of your idle time trying to scorch insects such as piss ants with sunlight focused upon them with a magnifying glass ~ of which you seem to have become one yourself !

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Jan 24, 2015 08:30:17   #
Apaflo Loc: Anchorage, Alaska
 
Zone-System-Grandpa wrote:
F1.4 would be the aperture and 1:4 would be zoom ratio.

Lens aperture is very commonly listed using the notation 1:4, which is equal to f/4.

And yes that can mean reproduction ratio (0.25 magnification) or the zoom range (4x). The only way to know is by the context.

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Jan 24, 2015 08:31:54   #
CO
 
Gene51 wrote:
This lens, along with the similarly priced but older Sigma 10-20 F4-5.6 are very popular among RE guys and gals. Both are sharp, and both produce really crisp and contrasty images.

My personal preference is to shoot a longer focal length, with the camera in portrait orientation, and create a 2-4 shot pano. Longer focal lengths will give you a more natural perspective (front parts of the image in proportion to objects in the back), and if you need wider, just add another shot, overlapping each at least 50%. Photoshop and PT/GUI make short work of the stitching process, and your images will have a look that is a cut or two above the images taken by everyone else typically using ultrawide lenses.
This lens, along with the similarly priced but old... (show quote)


This is an excellent point. Ultra wide angle lenses give you such an exaggerated perspective when you have objects up close relative to objects further back. I'm going to have to look into stitching together vertical shots.

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Jan 24, 2015 08:41:54   #
Apaflo Loc: Anchorage, Alaska
 
CO wrote:
This is an excellent point. Ultra wide angle lenses give you such an exaggerated perspective when you have objects up close relative to objects further back. I'm going to have to look into stitching together vertical shots.

Gene's point is not true!

Lens focal length is not what determines perspective!

If you stand in one spot and use an ultrawide to shoot a given shot, and then switch to a medium tele focal length to shoot 4 images that are then stitched together to show the exact same framing of the scene taken with the ultrawide, the perspective will be identical.

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Jan 24, 2015 09:03:06   #
Rustyphotographs
 
To your question as to f/1.4 is fast the answer would have to be yes although appropriate for portraits due to its shallow depth of field and low light conditions a fast lens is not necessary for real estate photography not to mention fast lenses are very expensive.

What is most in operant in Realestate photography is an wide lens more specially ultra wide between 10mm-21mm. The Tokina 10mm-16mm is a favorite for RE.

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Jan 24, 2015 10:12:37   #
NikonDad Loc: Bothell, WA
 
I use the Tokina 11-16mm f/2.8 DX lens on my D7000 for my real estate shooting. I get great results and at f/2.8 it's considered by most to be fast, especially for a zoom lens. I picked up a used lens for $400 up here in the great northwest :D

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Jan 24, 2015 10:43:24   #
lowkick Loc: Connecticut
 
NewzShooter wrote:
I found a lens advertised on craigslist listed as "NIKON 12-24mm f/1.4G ED DX LENS" however the photo of the lens attached to that ad does not read as f/1.4 but instead shows 1:4 G so my question is, is an 1:4 (that's 1 colon 4) lens different than a 1.4 lens? I'm guessing it would be quite different. So is a lens reading 1:4 actually an f/4 lens as opposed to an f/1.4 lens? Is an f/4 considered a fast lens? I would be using it primarily for indoor real estate photography. I need a wide angle lens, but is a lens that has printed on it 1:4 fast? Seems to me that is an f/4 and not a f/1.4 as the seller says it is. So does this mean it is NOT a fast lens? Please help! I don't want to throw away money needlessly. If it matters, my camera is the Nikon D7100, so is it even compatible with my camera?
I found a lens advertised on craigslist listed as ... (show quote)


The designation of 1:4 is the same as f/1.4. What it means is that the lens is able to shoot at f/1.4 through the entire focal length, in this case from 12mm to 24mm. Less expensive zoom lenses will show the f/stop as something like 1.4:3.5, meaning that you can open the lens to f/1.4 at the shortest focal length, but it stops down to f/3.5 as the fastest setting at the longest focal length. Of course, you can use higher f/stops throughout the range of the focal lengths available.

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Jan 24, 2015 10:50:34   #
Apaflo Loc: Anchorage, Alaska
 
lowkick wrote:
The designation of 1:4 is the same as f/1.4.

That is never true.

1.4 != 4

lowkick wrote:
What it means is that the lens is able to shoot at f/1.4 through the entire focal length, in this case from 12mm to 24mm. Less expensive zoom lenses will show the f/stop as something like 1.4:3.5, meaning that you can open the lens to f/1.4 at the shortest focal length, but it stops down to f/3.5 as the fastest setting at the longest focal length. Of course, you can use higher f/stops throughout the range of the focal lengths available.

That would be shown as f/1.4-3.5 (note the dash, not a colon).

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Jan 24, 2015 11:02:01   #
Bloke Loc: Waynesboro, Pennsylvania
 
dardan wrote:
Please be careful what you say if you don't know what you are talking about.

Firstly, there is no such thing as a Nikon 12-24 f/1.4, and secondly, how can a stated 12-24mm lens have a zoom ratio of 1:4?


:) I would love to see a photo of *any* f1.4 zoom lens. You could probably carry it ok, presuming that you were able to carry the suitcase full of money to the camera shop in the first place!

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Jan 24, 2015 11:20:21   #
OddJobber Loc: Portland, OR
 
Zone-System-Grandpa wrote:
F1.4 would be the aperture and 1:4 would be zoom ratio.


Zone-System-Grandpa wrote:
In no way was I suggesting that Nikon makes a lens as the OP had mentioned and the lens have a fast 1.4 aperture nor was I suggesting that Nikon makes a lens as the OP had mentioned with a zoom range ratio of 1:4 !


Then why did you mention it in this context?

BTW, "pissant", I love how you become so eloquent when anyone challenges your misinformation.

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Jan 24, 2015 11:39:25   #
Nukepr Loc: Citrus County, FL
 
Why has this discussion devolved into a urination and one-upping contest regarding who knows what about lenses. The man's original question was about a wide angle lens for his Nikon 7100, and NikonDad had an excellent answer and what I would recommend. I own a 7100 and use a Tokina 11-16 f2.8 lens for my wide angle. It is a very well-built lens, under $500 new and works well with the 7100.

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Jan 24, 2015 11:45:29   #
Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
 
Apaflo wrote:
Gene's point is not true!

Lens focal length is not what determines perspective!

If you stand in one spot and use an ultrawide to shoot a given shot, and then switch to a medium tele focal length to shoot 4 images that are then stitched together to show the exact same framing of the scene taken with the ultrawide, the perspective will be identical.


CO - I did a quick comparison for your benefit. Sometimes the drama of an ultrawide is creatively desirable - lots of impact. But sometimes a more "normal" perspective, achieved with the lens in portrait orientation and shot as a pano, provides a more pleasing look. Typically, when my client was a real estate agent, I would go for the ultrawide, but no architect or interior designer would accept an image like that, so pano was the obvious answer. When it is really critical, and the budget allows, my favorite two lenses for interior photography are the 24mm and 45mm PC-E lenses, for different reasons beyond the scope of this thread.

BTW - you are dead wrong on this one, dude. See attached images.

Edge distortion - volume anamorphosis - is an issue with ultrawides, less of an issue with longer focal length lenses to about 40mm or so. Beyond 60mm, you start to see a compressed perspective.

I took the images below with a tripod and two lenses - a 14mm and a 24mm lens - from the same position. For the 14mm shot, the camera was in landscape orientation. For the 24mm shot the camera was in portrait orientation, and I took 4 overlapping images.

The 24mm pano is more accurate and natural to the eye - and it is even wider in horizontal coverage than the 14mm ultrawide. On the other hand, the ultrawide, at 14mm, has considerable volume anamorphosis, seen in the brickwork vanishing point and the size and proportion of the mailbox on the left, and the planter on the right, and it provides, falsely, a greater sense of depth. Given the confines of my shooting space, I just kept it to 24 mm just for a quick demo. If I had a more suitable subject and a little more room the differences would be even more apparent. Ideally, I would shoot this at around 45mm for a more "normal" sense of depth and perspective, and possibly a double row pano to be able to get even more coverage for the top and the bottom of the image. But these are good enough to back up my statements, and completely discredit yours.

If you want to dispute this - back it up with an example or a reference. Otherwise eat a box of Exlax or a bag of prunes and let me know how things turn out - on second thought, that would be TMI.

Floyd you are terminally full of yourself - and a far cry from the expert on everything that you consider yourself to be. A true legend in your own mind if I ever saw one.

Now I fully expect that you will wriggle and squirm and figure out a way to come out on top with this one - being the weasel that you are. But as far as I am concerned I prefer to get my oats BEFORE the horse eats them, not afterwards.

14 mm
14 mm...
(Download)


(Download)

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Jan 24, 2015 11:49:57   #
Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
 
CO wrote:
When there's a colon between the numbers it has to do the the reproduction ratio associated with macro lenses. A 1:1 ratio is object's actual size is recorded on the sensor. 1:2 is half size.


Not on a Nikon lens - on the barrel. Nikon Macro lenses often have a designation in the distance scale that shows magnification as you state. Read the link - it explains this completely.

http://www.nikonusa.com/en/Learn-And-Explore/Article/gg1e57vo/how-to-read-your-nikkor-len...

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Jan 24, 2015 11:50:26   #
OddJobber Loc: Portland, OR
 
Nukepr wrote:
Why has this discussion devolved into a urination and one-upping contest regarding who knows what about lenses.


The Zone System Troll started it. :XD:

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