Lenses in relation to sensors
May 8, 2013 12:47:27 #
If I take a shot with a Canon L lense (full frame lense) with a full frame sensor and the same shot with the same lense with an APS-C sensor, what will be the difference in the shots.
May 8, 2013 12:51:33 #
The smaller sensor will make the full frame lens become a bit more telephoto, a 50mm becoming, effectively, a 75mm or in that vicinity. 1.5x and 1.6x and even 3x multiplication factors have been mentioned lately. Can't wait to try out my 900mm f/2.8 when my Pocket Cinema Camera arrives.
May 8, 2013 21:34:20 #
One thing you may gain - if the lens is soft on the edges the softnes will be croped out in the crop camera. L lenses may not be soft anywhere. - Dave
May 8, 2013 22:03:29 #
FredB
Loc: A little below the Mason-Dixon line.
lindmike wrote:
The shot taken with the smaller sensor will not have the same amount of visual "coverage" as the one with the larger sensor. Whether it's an L lens or not makes no difference. It's simple. Make a circle with your fingers around the palm of one hand. Look through the circle made by your thumb and forefinger. Now make a 'tighter' circle. Look through again. Ta-da! Big sensor - little sensor. That's all. Forget about the mumbo jumbo about 1.6 magnification or zoom or field of view. A smaller sensor captures less of the world than a larger sensor.If I take a shot with a Canon L lense (full frame lense) with a full frame sensor and the same shot with the same lense with an APS-C sensor, what will be the difference in the shots.
May 8, 2013 23:19:07 #
May 9, 2013 00:54:48 #
Yes, a smaller sensor captures part of the picture a full frame sensor would capture with the same lens, thats it. There is no magnification, the lens is not working differently because it has a different sensor behind it.
May 9, 2013 10:42:34 #
lindmike wrote:
If I take a shot with a Canon L lense (full frame lense) with a full frame sensor and the same shot with the same lense with an APS-C sensor, what will be the difference in the shots.
Look in this issue below in Photo Analysis, 6D vs 7D and you can see on the original shots the different image size in full frame and crop sensor. It was not an L lens but the same results just the same.
May 9, 2013 10:56:55 #
Its interesting how often this question appears. The concept is not new. If you went back to the 1930s there were 2 ¼ cameras that had adapters to use 35 mm film. The cameras had fixed lenses so the image on the 35 mm film was smaller. What was lost was the periphery.
It was also common to cut (punches where available) the 2 ¼ film to 24x36 mm to use in slide projectors.
Going further back the view camera would have backs extra backs that used differing sizes of film. The effect was pretty much the same.
Hasselblad film camera backs also can be used to take reduced sized negative on 120 film.
Where photographers as confused then as now?
It was also common to cut (punches where available) the 2 ¼ film to 24x36 mm to use in slide projectors.
Going further back the view camera would have backs extra backs that used differing sizes of film. The effect was pretty much the same.
Hasselblad film camera backs also can be used to take reduced sized negative on 120 film.
Where photographers as confused then as now?
May 9, 2013 11:49:51 #
lindmike wrote:
If I take a shot with a Canon L lense (full frame lense) with a full frame sensor and the same shot with the same lense with an APS-C sensor, what will be the difference in the shots.
The image captured by the APS-C sensor camera body will appear 60% larger (closer) than an image captured by the full frame sensor body.
May 9, 2013 12:19:46 #
I agree, this is the best explanation of this concept I've every seen.
FredB wrote:
The shot taken with the smaller sensor will not ha... (show quote)
May 9, 2013 16:26:36 #
FredB
Loc: A little below the Mason-Dixon line.
jeep_daddy wrote:
Now see, that's really not true. The image is not larger, nor are things magnified. The SIZE of the area captured is less, that is all. Go back to my first example with the hand telescope that we all did as kids. That's all a smaller sensor means, in the long run.The image captured by the APS-C sensor camera body will appear 60% larger (closer) than an image captured by the full frame sensor body.
May 9, 2013 16:44:25 #
JPL wrote:
Yes, a smaller sensor captures part of the picture a full frame sensor would capture with the same lens, thats it. There is no magnification, the lens is not working differently because it has a different sensor behind it.
However, the subject will occupy more of the image field creating "apparent magnification."
May 9, 2013 16:58:48 #
Jblanke wrote:
However, the subject will occupy more of the image field creating "apparent magnification."
Yep, in the end you do get a magnified image/print.
Take ( and these are relatively old examples) the Nikon D300 (DX) and the D700 (FX). Both are 12 MP cameras. Put a 200 mm lens on the D300 and a 300mm on the D700 and shoot the same scene from the same vantage point at the same setting. Make an 8 x 12 inch print of each. Other than the D300 sample having a bit more depth of field, they will look almost identical. Put the 200mm lens on both cameras and the D300 image will look 1.5x closer.
May 9, 2013 17:17:35 #
You can also get the same magnifying effect by cropping the full frame picture, no need for another camera to do that.
May 9, 2013 17:25:56 #
JPL wrote:
You can also get the same magnifying effect by cropping the full frame picture, no need for another camera to do that.
Although..........I can crop away at shots from my 5d MK II all day long and get better results than cropping shots from my 40D, which is a 1.6 crop sensor. Then again, the 5d MK II is also a 20+ MP sensor......and that has a ton to do with it. When I attempt to squeeze out a distant shot from the 40d by cropping, I usually get a lot'a noise.........especially in a low light shot. That is why, one day, I gotta find a way to get a 5D MK III. I love shooting full frame.
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