All Questions
166
questions
2
votes
2
answers
67
views
Do non-constant aperture zoom lenses vary aperture when zooming, when the aperture is not set to wide-open?
I am an experienced amateur photographer and videographer using a Sony a7sII with a Sigma 28-300mm f3.5-6.3 hyperzoom lens for a music video shot. I notice that when I test the shot zooming out all ...
0
votes
4
answers
94
views
Brightness of a full frame lens mounted on aps-c vs mounting an identical native aps-c lens [duplicate]
I am a bit confused about the effect of using a full-frame lens on a aps-c camera on the brightness of the resulting image.
Lets say we have two lenses:
A full frame 50mm f2 lens
An aps-c 50mm f2 ...
2
votes
2
answers
265
views
Tamron SP 500mm mirror lens changing aperture and DOF
Please help me understand. I have the above F8 mirror lens. I know the difference between F stop and T stop. I have measured this T stop experimentally it is higher than F8. The DOF feels very narrow ...
- 89
5
votes
3
answers
1k
views
Is aperture the same on different format of lenses?
I have just acquired a large format lens (a Schneider-Kreuznach Angulon 1:6,8/90) for the first time, coming from 35mm and medium format, and I am a bit puzzled by its aperture.
I want to make sure I ...
- 153
0
votes
2
answers
1k
views
There are many f2.8 zooms for FF. Why are there so few f2/f1.8 zooms for APS-C?
APS-C/Super35 cameras are less staple for film than they were before, but are still widely used. Besides, there are quite a few semi-professional APS-C DSLRs on the market.
As far as I understand, a ...
- 165
0
votes
4
answers
3k
views
Can aperture be changed in aperture mode even with a constant maximum aperture lens?
I am new to non-auto mode.
If I have a fixed aperture lens with f/2.8 16–35 mm. Does this mean I cannot change the aperture to f/4 or f/5 on my camera because the lens only supports f/2.8?
Is the f/2....
0
votes
3
answers
592
views
How can I control the aperture of a Nikon G lens when using extension tubes? [duplicate]
Due to corona lockdown, I'd like to try macro photography. I have two lenses (18–55 and 35 f/1.8) and a Nikon D5300. As I currently do not have the money to buy a real macro lens, I found 3 cheaper ...
- 1,608
2
votes
2
answers
361
views
How to fix diaphram of Nikon 14-24mm f/2.8 G?
Somehow one of the nine blades in the aperture of my Nikon 14-24mm f/2.8G has come fully loose and can be seen laying turned sideways when I look through the lens. I don’t want to pay to repair it, ...
- 21
1
vote
1
answer
1k
views
Why does aperture change when I zoom my lens even in manual mode? [duplicate]
I have my Nikon D7500 set to Manual Mode. I can change the shutter speed and it maintains the setting. When I change the aperture, the setting is not maintained and varies depending on the zoom of ...
- 11
0
votes
2
answers
113
views
Aperture and the understanding of how it works [duplicate]
So over black friday I bought this bundle, which is the Nikon D3500 two kit lenses.
I was wondering, I keep hearing people talk about aperture and using F11-F16 but on those lenses that I have, all I ...
- 1
19
votes
5
answers
3k
views
What are the benefits of the classic f-number scheme?
Classic ƒ numbers are entrance pupil diameter as a fraction of focal length. This seems like a slightly strange choice as exposure is proportional to area rather than diameter. Naively I would think ...
- 416
1
vote
2
answers
3k
views
Why doesn't the aperture change on a Nikon AF 50mm ƒ/1.8D lens? [duplicate]
I am facing problem with a Nikon AF 50mm ƒ/1.8 lens which is attached to a Nikon D7100. Although I can change the aperture from the camera (in M mode) it seems that it is not changing in photos. What ...
- 21
2
votes
1
answer
951
views
Canon 50mm f/1.8 lens won't go down to f/1.8
Bought a 1.8 lens.
Today on manual I realised it won't go down to f/1.8, the lowest is f/2.8, but on other modes it does.
The camera is a Canon 5Ds.
p.s - just moved to canon so is there a setting ...
- 131
2
votes
3
answers
440
views
Is diffraction limited aperture independent of lens?
I have always understood diffraction limited aperture as a property of the camera and its sensor, not of the lens. The camera has a certain sensor size and a certain megapixel count, which together ...
- 6,835
0
votes
3
answers
173
views
Does a camera have to have a contiguous housing?
The lens group in this picture would have its own protective lens tubes like the one on a camera but one for each lens group. What would be an issue having a gap between the lens group and stray light ...
- 1
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