All Questions
3,122 questions
0
votes
0
answers
8
views
Using trigonometry to compute the position of an object inside of a drone picture [migrated]
Assume I have a certain picture taken aerially by a drone. The yaw, pitch, and roll of the drone gimbal are known, and so are the horizontal and vertical FoV of the camera. We also know the $$x, y, z$$...
- 111
0
votes
2
answers
120
views
Why do some lenses have the zoom ring reversed?
It isn't a dealbreaker for me, but it is confusing that some lenses have the zoom ring reversed. For instance, my Canon EF zoom lenses all have their lowest focal length on the left and highest on the ...
0
votes
1
answer
28
views
Are Nikon N90s parts compatible with a Nikon Coolpix L810?
I was able to obtain a Nikon n90s camera with multiple lense attachments (Aspherical LD Tamron and a Hoya 58mm Skylight (18) by Vivitar I think) two flash attachments, and a MD-15 Motor drive. Would ...
0
votes
1
answer
75
views
For a Sony crop E-mount body, how do I choose between the 50/1.8 and the 55-210?
I'm not a professional, just a hobbist. I have a Sony ZV-E10 with the kit lens (16-50 mm, F3.5-5.6). Now, I want to buy a new lens and want to choose in the budget range, but not sure how to decide ...
- 103
1
vote
3
answers
347
views
Why don't zoom lenses provide higher aperture for lower focal lengths?
I have a Nikon lense with below specification:
Focal Length Range: 18-140mm
Maximum Aperture Range: f/3.5-5.6
So the diameter of the lense is at least: 140/5.6 = 25mm.
My question is if the lense has ...
0
votes
2
answers
52
views
Canon 600D Kiss X5 Optical Viewfinder Vignette Using Canon EF 50mm 1.8
Canon 600D Kiss X5 Optical Viewfinder Vignette Using Canon EF 50mm 1.8
Hi, is it normal to get a heavy vignette (large round border) using a 50mm 1.8 through the viewfinder (photos are ok as is the ...
- 1
1
vote
3
answers
1k
views
Quality difference between Sigma 30mm f1.4 Art and Contemporary
Sigma has two versions of its 30mm f1.4 lens: One in the Art line
with mounts for various DSLRs and one in the Contemporary line with mounts for various
mirrorless cameras.
I'm wondering why the ...
- 373
0
votes
0
answers
35
views
Bought a Minolta Minolta AF 70-210mm f/ 4 lens can it fit on my Canon Rebel T7 body? [duplicate]
Bought a Minolta AF 70-210mm f/ 4 and I use a rebel T7 is there a adapter available to use for them?
- 1
0
votes
1
answer
69
views
Diffrence between these 2 lenses
I have a DX AF-P NIKKOR 70-300mm 1:4.5-5.63G ED LENS. is it worth getting a Nikon 70-300mm f4.5-5.6AF-P ED VR LENS. Is there a benefit?
1
vote
2
answers
127
views
What are the filter size of these vintage lenses?
These lenses I have from the 1960s don't have a filter size marking; can someone find them out for me?
Minolta MC Rokkor-PF 1:1.4 58mm (5592305)
Minolta MC Tele Rokkor-QD 1:3.5 135mm (1531042)
...
1
vote
1
answer
86
views
Identifying unknown lens (Auto Rexar 35mm)
Found an old lens in a thrift shop, marked as "Auto Rexar", made in Japan. Can anyone identify who made it, date of manufacture, specs, or other info. It has a Minolta mount.
Seems to be no ...
- 177
0
votes
2
answers
71
views
What is causing the camera to have pincushion distortion in air and then barrel distortion in water?
I have been working on a research project this summer looking at penguin body cameras and how we can measure the size of prey they catch from the video footage. This involved me taking some ...
- 1
2
votes
2
answers
980
views
How to make sure to only get full frame lenses for the Canon EF (non-mirrorless) mount?
As an amateur, I am looking for used lenses for my Canon EOS 5D Mark II. I know that it's so called full frame, like the old 35mm film cameras. I am confused with all the abbreviations and ...
- 189
3
votes
3
answers
119
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
5
answers
120
views
As a beginner, how do I figure out which lens to get next? [duplicate]
I have a Canon R50 camera and am looking for a more versatile lens. I am looking at RF 24-104 STM 4 - 7.1 or with an adapter the EFS 18-135 3.5 5.6 USM
Also looking at a 18-250mm F3.5-6.3 DC MACRO
I'...
3
votes
2
answers
142
views
Shooting on B&W infrared film with Canon L glasses
Canon EOS-1V manual says about shooting on B*W IR film:
Use a lens which provides IR index. With L-series lenses which do not have an infrared index, there is no need to compensate for infrared film.
...
- 329
1
vote
3
answers
117
views
What is the difference between working focus distance and infinity focus in Camera Lens (specially machine vision camera)
I am new to camera lenses and am trying to understand their details. I have learned concepts like aperture, focal length, FOV, IRIS, and different mounts (C, CS type, etc.).
I have a question ...
3
votes
4
answers
1k
views
How do I tell which kit lens option is more all-purpose? [duplicate]
I have been shooting photos for a long time with a smartphone, and now I want to "gear up" to improve my skills. I mostly shoot landscapes but I'd also like to learn to do some portraits.
...
- 133
2
votes
3
answers
150
views
What specs should I look at when shopping for a lens to take talking-head-at-a-desk and closeup shots?
I want to purchase a lens for my Nikon D750 that can zoom in and out, and will be good for taking selfies/vlogging at a desk. It would also be nice if this lens could also be used to shoot words on a ...
- 21
2
votes
5
answers
188
views
Thin lens focal length vs perspective
Thin lens and perspective
It's well regarded focal length of a camera lens does not affect perspective.
While by using the thin lens equation
$$\frac{1}{s}+\frac{1}{i}=\frac{1}{f}$$
we can compute the ...
- 41
0
votes
3
answers
104
views
Dirt is on the sensor or in the lens
Hi i'm new in dslr cameras. I have this canon and when i take pictures of the sky this happens.
I already clean the sensor and also the lens (i open it to clean from inside), but still have this fuzz ...
- 1
0
votes
3
answers
299
views
40mm f/2.8 or 50mm f/1.8 on APS-C for versatile shooting?
I'd like to get a new lens, but I'm not sure weather to choose a focal length of 40 mm or 50 mm (mounted on APS-C) : the EF 40 mm f/2.8 or the EF 50 mm f/1.8 from Canon
I'm not specialized in ...
- 1
0
votes
2
answers
152
views
Should I upgrade my lens or am I just looking at photos on a pixel level?
I'm new to photography. I've had Nikon D3300 paired with Nikkor 18-70mm f/3.5-4.5 lens for half a year (shot ~2k photos) now and it's been my first ever contact with a DSLR. The reason why I want to ...
- 103
2
votes
1
answer
692
views
How to disassemble this part of the lens?
This is a Nikkor 1.8 50mm Which seems to have fungus inside the glass. How do you disassemble this part to clean from the inside?
2
votes
1
answer
84
views
Mounting Canon focus by wire lens (EF 50mm f1.8 STM) to EOS 300
I recently got a Canon EOS 300 (the film version, not digital) and would like to buy a faster lens in addition to the kit lens which I received with it.
I see that the 50mm f1.8 STM is still in ...
- 123
1
vote
3
answers
147
views
I have a Canon EOS 50D, and my lens (EFS 18-200 mm) just broke. What should I replace?
I'm not sure how much the body of a camera impacts the quality of a photo. I'm not new to photography but I am very new to photography gear. Replacing the lens is about 150 on ebay.
Is it worth it to ...
2
votes
1
answer
113
views
Nikon Lens dropping focus
I use my camera for sports photography and midway through an event on Sunday my Nikon Nikkor AF-P 70-300mm VR ED lens stopped focusing correctly. It have not dropped or hit it the lens just stopped ...
- 123
0
votes
0
answers
66
views
Tamaron 150-500 A011 lens auto focus issue
I bought the Tamaron 150-600 A011 lens 7 years ago. As I was focused on my work, the lens was being used rarely. I was having VR issues which are not yet resolved due to motor problems. I also found ...
- 1
1
vote
1
answer
202
views
How can I clean fungus in my lens, and/or prevent fungus from spreading in the lens?
I just recently saw my lens having fungus on lower front glass. It doesn't affect the output but I'm just going to ask that since that there is a fungus present in the lens now, will it become worse ...
- 11
0
votes
1
answer
102
views
Calculating FOV for mismatched lens/sensor size
I have this 50mm lens that gives the FOV for a 2/3" sensor in its spec sheet:
Diagonal: 12.6°
Horizontal: 10.1°
Vertical: 7.6°
I have this camera, which, according to its spec sheet, has a 1/2....
- 577
0
votes
4
answers
218
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 ...
1
vote
1
answer
129
views
Is this Normal?, Nikon 24mm pc-e shift knob wobble
I hope somebody can help me.
I have just bought a Nikon 24mm pc-e lens that was delivered to me. It was packaged badly leaving two sides of the lens with just a single piece of cardboard for ...
- 11
3
votes
5
answers
456
views
Why does viewing the sun through a telescope burn your eyes?
First a disclaimer: I KNOW that viewing the sun through a telescope will burn my eyes, so no need to convince me of that. I'm not going to try it. This question is about the optics and physics of why ...
- 155
0
votes
1
answer
61
views
What to look for when renting a lens for the solar eclispe
I'm doing research on renting a lens for my camera, it's a Canon Rebel T4i for the solar eclipse. What do I look for to see if a lens can be mounted to my camera. I'm thinking of getting a Canon 100-...
- 103
1
vote
1
answer
52
views
Tiffen telephoto converter 1.5x37mm
I have a Tiffen telephoto converter 1.5x37mm is it any good and what is it used for?
Thanks
- 11
0
votes
0
answers
186
views
Can anyone help identify the lens mount on this Vivitar 85 - 205 lens?
Trying to identify my copy of this classic lens.
A similar question has been asked here previously, but my lens appears to be slightly different to that one.
It's a Vivitar 85 - 205 Auto Tele-zoom, ...
0
votes
0
answers
296
views
Can I fix or troubleshoot my 14–42 mm lens that isn't working with Olympus OM-D E-M10 Mark II?
I have an Olympus OM-D E-M10 Mark II camera with two lenses: 14–42 mm and 40–150 mm. When photographing the rain, suddenly the 14–42 mm lens stopped working giving the following error: "Check the ...
1
vote
1
answer
92
views
Dropped PowerShot SX70 HS with lens full extended, now bent
Is this camera finished? the lens is fully extended, bent, and won't retract. Camera tries, makes a horrible clicking sound, and then shuts down. And I cannot move the lens back into position.
- 11
1
vote
1
answer
198
views
What should I consider when choosing a lens for beauty/makeup photos and videos?
I own a Canon M50 Mark II and I’m looking for a lens to record makeup videos and shoot beauty photography. What lens specs should I be considering to make sure a lens is well-suited for this?
- 11
1
vote
2
answers
214
views
Building an imaging array with multiple sensors?
If I purchased two image sensors that had a resolution of 80x62 with 45 degree field of view, would there be an easy way to concentrate two sensors into a resolution of 2x(80x62) with a 45 degree ...
- 591
1
vote
1
answer
342
views
Is there a free alternative to Photoshop's Adaptive Wide Angle filter?
Adobe Photoshop provides an Adaptive Wide Angle filter to to correct lens distortions. I really like the intuitive user interface which allows me to just draw a line to fix issues. Is there any free ...
- 111
1
vote
1
answer
100
views
How can I tell what gear is appropriate to shoot architecture and street while travelling? [closed]
I'm a beginner photographer and I'm going to Japan soon. I have a Canon Rebel T8i and the 18-55mm lens that came with it. I want to take pictures of the architecture and some street photography too.
I'...
- 11
0
votes
2
answers
71
views
Nikon D5300 mounting issues with 35mm
I just bought a (used) Nikon AF-S DX 35mm F1.8 G for my D5300 and I can't make it to work properly. My 18-55mm works fine and I've never had any issue attaching it to the camera, but when I got this ...
1
vote
2
answers
273
views
Is 35mm 1.8 lens suitable for Product, interior photography?
I'm still a beginner, is 35mm lens is suitable for product photography, mostly e-commerce products and hotel room pictures.
- 11
1
vote
2
answers
164
views
Lens out of focus? - Digicam Panasonic Lumix DMC-FH20
Recently, the pictures on my digicam have been coming out like this (img 1) — out of focus, and with a black corner on the right. The black corner would disappear if I tilt the camera to the left (img ...
- 11
1
vote
3
answers
687
views
Struggling to find DX-fit telephoto lenses. Advice?
Looking at wildlife photography, the general beginner recommendation seems to be a cropped sensor with a 400mm lens. But, then I found out (I think this is right?) that you can't interchange lenses ...
- 11
2
votes
9
answers
4k
views
Is a 400mm enough for long-distance wildlife photography?
Transferring from a bridge camera, I've really struggled to find any info for what you actually need for a wildlife photography.
From what little I've gathered, most seem to recommend a cropped-sensor ...
- 101
2
votes
1
answer
74
views
Help with Vivitar Universal 500MM Preset Lens and a Nikon d5300
Hi I have a Vivitar Universal 500MM Preset Lens with a Nikon d5300 body. I bought the adaptor after reading that the lens will be compatible with my camera if i use manual mode. However, when i try it ...
- 21
3
votes
1
answer
444
views
Can lenses be damaged if stored too dry
I just set up a simple DIY dry box (air-tight box + silica gel) to store my lenses in.
The silica did a good job and quickly reduced the humidity inside the box to ~10%.
From what I read, recommended ...
- 373
0
votes
0
answers
68
views
Is it physically possible to mount a manual EF-M or RF lens onto a Canon EF mount DSLR without an adapter? [duplicate]
I don't care about the electronic communication between the lens and camera. I have a Canon Rebel T7i, and planning to to buy 7artisans 35mm f/0.95 but this is only available in EF-M mount or RF mount....
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