All Questions
166
questions
2
votes
2
answers
75
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
96
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
269
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
594
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
366
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
955
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
0
votes
1
answer
221
views
Can a camera be a mile long?
Could parts of a camera be spaced out over a distance rather then together to work in a way a normal camera cannot? What characteristics would this camera have over a normal camera?
In the picture ...
- 1
1
vote
1
answer
167
views
Is there an online lens diffraction and maximum sharpness table?
I simply want to see an table that lists the lens diffraction limit of each camera.
I have came across this well done answer with animated PNG
and I realized there i also the perfect sharpness ...
- 2,019
2
votes
1
answer
721
views
What should I do when my D3400 aperture is stuck no matter what lens I use?
I have a D3400 and recently I haven't been able to change the aperture on any of my lenses in manual mode. I have lenses with aperture rings and if I set the aperture to anything below the largest ...
- 21
0
votes
1
answer
72
views
Question on f-number and exposure [duplicate]
Is there any mathematical proof to show that the exposure in a camera is independent of the focal length used, if the f-number (ratio of focal length to lens diameter) remains constant?
- 177
1
vote
2
answers
718
views
Relationship between f-number and amount of light being let into the lens system [duplicate]
Why does smaller f-number imply greater aperture diameter and consequently, greater amount of light entering the lens of a camera?
As evidenced from my study across a number of resources, an absolute ...
- 177
8
votes
6
answers
2k
views
Does a lens with a bigger max. aperture focus faster than a lens with a smaller max. aperture?
The assertion by a well known photographer is that the Nikon 400mm f/2.8 set to an aperture of f/5.6 will let in 4 times the light compared to a Nikon 500mm f/5.6 lens set to f/5.6, keeping the ...
- 193
1
vote
1
answer
730
views
Clicking sound and flickering display when using Sony 70-200 F4
I recently purchased a Sony 70-200 F4 and have been testing it on my A7 (the very first one). I noticed that there's a clicking sound and the display (both in the LCD and EVF) flickers whenever I ...
- 143
4
votes
3
answers
180
views
Why is that the wider the aperture of a lens is, the more we can see through narrow cracks and crevices?
Example I took at 85mm f/1.4 on APS-C sensor:
- 41
8
votes
4
answers
3k
views
Why is Nikon 1.4g better when Nikon 1.8g is sharper?
I am new to photography (just 3 to 4 months of experience) and I am looking to buy a new lens (either 35mm or 50mm, but mostly 35mm because I have already decided Sigma 85mm f/1.4 DG HSM Art Lens for ...
- 577
0
votes
1
answer
659
views
Panasonic Lumix G 42.5mm F/1.2 vs Panasonic Lumix G 42.5mm f/1.7 ASPH Power O.I.S
How much of a difference these two lenses will make in photo quality and what will be the difference? I am a newbie in photo and I am looking to invest in a nice lens for 4/3 that has max features in ...
- 143
14
votes
2
answers
1k
views
How do apertures which seem too large to physically fit work? [duplicate]
A 400mm f4.0 lens is supposed to have a maximum aperture diameter of 10cm. Looking at such a lens they don't seem big enough to fit that kind of aperture including all the mechanics for control inside ...
- 243
0
votes
2
answers
118
views
Aperature/f stops/lenses [duplicate]
I am interested in landscape photography and a common point I hear thrown around is that a higher aperture (f11-f22) is best for landscape photos. However, every blog, YouTube video and photography ...
- 1
0
votes
2
answers
66
views
How do constant aperture zooms produce identical exposure, even though focal length is larger? [duplicate]
My understanding is that a larger focal length corresponds to a larger working aperture diameter, since the numerator is larger.
Why doesn't a larger working diameter correspond to a brighter image? ...
- 113
2
votes
4
answers
670
views
What are the technical reasons to design lenses with oddly shaped apertures?
Some lenses have oddly shaped apertures, like star or shuriken shaped. It seems to be intentional since making "normal" rounded or polygonal apertures is fairly simple (as I have observed while ...
- 27k
16
votes
3
answers
1k
views
Is it worth upgrading one stop for wildlife photography?
I have just purchased the following lens to accompany my Nikon D500:
AF-S NIKKOR 70-200mm f/4G ED VR - £1,349 (see here)
However, having purchased this lens a few hours ago, it has been pointed out ...
- 305
Hot Network Questions
- Why does "They be naked" use the base form of "be"?
- How do I know if a motion is 1 dimensional or 2 dimensional?
- Open or closed windows in a tornado?
- Why can THHN/THWN go in Schedule 40 PVC but NM cable (Romex) requires Schedule 80?
- Can I cause a star to go supernova by altering the four fundamental forces?
- Alternative to isinglass for tarts or other desserts
- replacing a 15-amp breaker with a 20-amp breaker
- What are good reasons for declining to referee a manuscript that hasn't been posted on arXiv?
- Why don't we call value investing "timing the market"?
- Poincaré duality and Mayer–Vietoris sequence
- Flights canceled by travel agency (kiwi) without my approval
- What is the meaning of the "Super 8 - Interactive Teaser" under "EXTRAS" in Portal 2?
- Selecting unsymbolised features in QGIS
- Bound on the number of unit vectors with the same pairwise inner products
- Is the "you" in "you may be perfect and complete" (James 1:4) meant as a group or as an individual?
- Non-ASCII characters are not imported correctly in MetaInformation (Solution for FLAC attached)
- I can't find a nice literal translation for "Stella caelis exstirpavit"
- How can I connect my thick wires into an ikea wire connector
- Connection between Parseval's Theorem to Fourier Transform is Unitary
- Can perfectly stable orbits exist in GR?
- Formula for bump function
- Teaching students how to check the validity of their proofs
- Left crank arm misaligned on climb
- What's that little animation between Avatar: The Last Airbender Book 2 and Book 3?