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Questions tagged [lens]

A photographic lens is used to focus the light onto film or a digital sensor. Many cameras have interchangeable lens systems, allowing the photographer to choose the type of lens to use.

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Can any MFT lenses be turned into a practical object-space telecentric macro lens by reversing?

The micro four thirds specifications originally want lenses to be image space telecentric if possible. It seems that some MFT lenses actually follow that recommendation. Can reversing such a lens ...
rackandboneman's user avatar
4 votes
1 answer
266 views

What lens would suit an A4 large format camera

I'm planning on building a scanner camera. The principle of which is simple: everything's built like a large format camera, except the film is a simple scanner controlled by computer. Now, building ...
Zmaragdinae's user avatar
3 votes
0 answers
160 views

How do these modern multi-lens/multi-sensor smartphones work?

My last smartphone just had one front lens, so I could understand. My current phone has three front lenses (and three sensors, too, I guess), so I was a bit surprised, that I had zero control over the ...
U. Windl's user avatar
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3 votes
0 answers
509 views

What are the different types of auto-focus motor and how do they compare?

What is the difference of ultrasonic motor, stepper motor, and electromagnetic drive? Which one of these are lens-based or screwdrive? What are the advantages of lens-based servo over screwdrive and ...
KohGeek's user avatar
  • 492
2 votes
0 answers
70 views

Threaded filter origin

Historically, who originated the convention of front-of-lens filters measured in millimeters? From a casual search looking at photos in Wp etc.: General discussion of filters appears to suggest that ...
Mark Morgan Lloyd's user avatar
2 votes
0 answers
321 views

What type of lens do I need to build a ciné film scanner

I want to build a scanner to digitise standard 8mm ciné film using my Eumig 8mm projector and a Raspberry Pi with the High Quality camera module. I am not too worried about the mechanical, electronics ...
Mick's user avatar
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2 votes
1 answer
366 views

Canon 6D Mark-ii + Kenko C-AF 1.4x Teleplus pro 300 + Kenko 1.4x teleplus HD shows Error

I have a Canon 6d mark-ii camera. However, the kenko lens are not working and yesterday, I tried to fix my camera with a friend. They had the same camera and lens but those are working with mark-ii ...
Mishra Aditya's user avatar
2 votes
0 answers
885 views

Nikkor 28-70mm F2.8 lens problem: AF and aperture don't work

I bought this lens second hand from someone who has no idea about this kind of thing. The price WAS low, but not low enough to justify a broken lens. It has no glass scratches and at 300£ it seemed to ...
Stefan Horvath's user avatar
2 votes
1 answer
785 views

Why is my Nikon 18-300 lens not focusing at higher focal lengths?

I found a similar question about the 18-200. Someone suggested screwing the front element tighter. Is it possible to do the same with the 18-300? My problem happens at 200-300mm. I am not sure how to ...
farmer marx's user avatar
1 vote
1 answer
136 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 ...
Jonas's user avatar
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1 vote
0 answers
81 views

Nikon D3100 Making weird sounds while trying to take photo

Whenever it try to take a photo on my nikon D3100 it keeps making weird motor sounds. I have dropped its lens once about 3 months ago but has been working fine until now. Here's a link to the sounds ...
Panav Chaudhury's user avatar
1 vote
0 answers
44 views

How do I figure out which C adapter I need to use a CX4 Microscope Camera?

I work on very small electronics and I was trying to get a camera to take pictures of the boards that I work on. I ordered a CX4 cmos camera and got a C adapter to attach it to my microscope. It ...
Teekink's user avatar
  • 11
1 vote
0 answers
247 views

Motion tracking/VFX: How to get needed info for iPhone camera?

Basically, I want to do VFX with my iPhone SE 2nd Generation front-facing camera. The software being used is Blender up-to-date. I'm not sure what to set Blender for in the track camera settings field,...
TheLabCat's user avatar
  • 111
1 vote
0 answers
159 views

Nikon Ai 300/4.5 - remove lens hood

I am not quite sure what has happened here, but ...: After having been out in the rain and using my Nikon Ai 300mm f4.5 lens, I just tucked it away in my camera bag and forgot it there. It was ...
jarnbjo's user avatar
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1 vote
0 answers
2k views

Canon Powershot Lens Error

I have a Canon Powershot Camera SD1400 IS camera. It accidentally got dropped, and is now giving a Lens Error. :( When I turn it on, it attempts to bring the lens out, but then retracts and says the ...
10 Rep's user avatar
  • 191
1 vote
0 answers
189 views

What is a better lens for Mirrorless camera? EF-M 55-200 mm vs EF-S 55-250 mm with adapter

I just ordered the EF-M 55-200 mm. I was looking only for lens directly for M, but after I made the order I also checked the EF-S / EF lenses and I found that they are probably better like 55-250 mm, ...
luky's user avatar
  • 111
1 vote
0 answers
189 views

Lens stuck on enlarger board/mount

I have a LPL VC7700 VCCE 6x7 enlarger with two Nikon El-Nikkor lenses (50 and 80) that I could easily interchange up until yesterday. Now the 80mm lens is stuck on the lensboard : when I try and ...
nicnhus's user avatar
  • 103
1 vote
0 answers
116 views

Angenieux 6-80mm Super 8 lens "40/80" knob

I'm new to the world of film. My Beaulieu 5008-s came with the Angenieux 6-80mm f/1.2 lens. About half way up the barrel there is a small knob engraved with "40" along the edge and "80" directly ...
James's user avatar
  • 11
1 vote
0 answers
744 views

Fujifilm Instax mini 90 lens cover won’t close

My mini 90 neo classic camera lens cover won’t close when turned off. Please help To note: took it to the beach to take some pictures and there was a storm happening and lots of sand was blowing ...
tati.mini's user avatar
1 vote
0 answers
69 views

Can I adapt my 38mm auxillary lens microscope to use more widely available 42mm ones?

I have a Bausch and Lomb/Leica StereoZoom 4 microscope that I would like to use for microsoldering and occastional photos. Unfortunately, it only has 10X eye pieces and no auxillary lenses or ...
ATL_DEV's user avatar
  • 123
1 vote
0 answers
181 views

Using Nikon PS-4 bellows to copy 35mm negs

I want to digitize my old b&w negs, and have an old PS-4 bellows unit to use on my Nikon D5200, an SLR with a DX format sensor. My PS-4 manual predates DX, and shows a table with lenses from 20mm ...
D. MInehart's user avatar
1 vote
0 answers
157 views

What are the underlying causes of artifacts seen with anamorphic lenses?

When a camera with an anamorphic lens shows some artifacts, they are usually either an oval bokeh (vertical) or a lens-flare steak (horizontal). How much of these artifacts are due to the "anamorphic ...
Frezzley's user avatar
  • 111
1 vote
0 answers
3k views

What is the impact of changes between the old and new Nikon 18-300mm lens?

The lenses I am considering are: Nikon AF-S DX NIKKOR 18-300mm f/3.5-6.3G ED VR Lens (new) Nikon AF-S DX NIKKOR 18-300mm f/3.5-5.6G ED VR Lens (old) As far as I can tell the only differences are: ...
Alec Teal's user avatar
  • 229
1 vote
1 answer
2k views

Camera showing incorrect used focal length in EXIF data

Using a Canon 5D Mk2 with a 17-40mm f/4L lens. Everything seems to work just fine, except no matter how i shoot, the EXIF-data will show 40mm as the used focal length, even if I know the image is ...
Tindra's user avatar
  • 812
0 votes
0 answers
33 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 ...
Rahul's user avatar
  • 1
0 votes
0 answers
61 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, ...
Gareth Stack's user avatar
0 votes
0 answers
95 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 ...
Miguel Garcia's user avatar
0 votes
0 answers
104 views

OV7955 image sensor display green/purple tint

I have a Omnivision OV7955 color CMOS analog NTSC image sensor. When I connect to the monitor, monitors display green/purple tint. I thought monitors has a problem, but I tried other cameras but ...
IK35's user avatar
  • 1
0 votes
0 answers
49 views

Seeking Expert Advice for Banff Trip: Upgrade Dilemma - New

I'm gearing up for a trip to Banff, Alberta, next year. Planning to go for a week and see both Banff and Jasper. I need some expert advice on lenses. Currently, I'm using a Canon RP with a RF 15-35mm ...
Prabhjot 's user avatar
0 votes
0 answers
86 views

Is this effect because of the lenses? what type?

https://www.instagram.com/p/CwsKDthOdST So in this video, the legs of the man look really small. I thought at first it must be because of the lenses but if it were for wide angle lenses, that would ...
jazmin garcia's user avatar
0 votes
0 answers
51 views

Fujifilm Xt200 lens error with Viltrox 23mm/f 1.4 lens

I just bought my first lens, an Viltrox 23mm/f1.4 for my Fujifilm Xt200 camera and I have this error where the display starts flickering and then the LENS ERROR appear and can't figure out the problem....
Drew's user avatar
  • 1
0 votes
0 answers
105 views

Canon Powershot SX130 IS Lens error

So, i was taking some pictures with my camera, and when I wanted to clean it, It said "Lens error, will restart automatically". I did nothing wrong to the camera and to the lens, they were ...
k0leww's user avatar
  • 1
0 votes
2 answers
182 views

I want to measure far distance focus in a short space, but give myself a greater FOV, how would I do that?

Building off of this question, say I put a 1 m lens in front of a camera so I can see a virtual image at 500 m to focus to, when I place an object within the focal length (0.998 m), but I want a ...
user avatar
0 votes
0 answers
93 views

Canon 85mm front glass spots problem

I have canon 85mm f1.8 lens but the front glass got a lot of tiny scratches and it's affecting the sharpness. Can it be repaired or replaced? How much does it cost?
Sadia's user avatar
  • 11
0 votes
0 answers
62 views

Olympus M.Zuiko 100-400mm lens on a Panasonic GH4?

The lens in consideration is the Olympus M.Zuiko Digital ED 100-400mm f/5-6.3 IS Lens for a Panasonic GH4 which I already own. I have reviewed the x lens, y camera question/answer, but looks like ...
ericnutsch's user avatar
0 votes
0 answers
129 views

Recreate this lens specification

So my Samsung note 10 details say this about their telephoto lens 12 MP, f/2.1, 52mm (telephoto), 1/3.6", 1.0µm, PDAF, OIS, 2x optical zoom. I tried using it to see through my peephole which has ...
Green Giant's user avatar
0 votes
0 answers
198 views

Choose lens for Olympus OM-1n

I just got an Olympus OM-1N since I decided to play with analog photography. It came with the regular 50mm f/1.8 lens which is quite fine for many occasions, however I realized that I need a wide-...
Arkoudinos's user avatar
0 votes
1 answer
571 views

Can I reattatch the parts of my Canon 50mm f/1.8 lens which broke in a fall, without further disassembly?

The upper part of my Canon EF 50mm f/1.8 II Lens is separated from the lens body due to a fall. One of its 4 lugs has broken off. Can I still attach the upper and the lower parts without ...
burf's user avatar
  • 9
0 votes
1 answer
463 views

Why does my adapted f/2.8 lens make very dark images in manual and action mode?

I'm using a Sony A7 II with adapter with a Canon EF 24-70mm f/2.8L and a Canon 16-35mm f/2.8L both with the same settings, but the exposure on the 24-70mm is darker in the manual and action modes, but ...
Johnson Tran's user avatar
-1 votes
1 answer
134 views

Stuck lens off - scared to reattach another lens

I managed to get my 50mm lens off my camera (it was stuck) and it looks like one of the lens pins was broken. I'm scared to reattach another lens. Was it the camera body that was making the lens stuck ...
Dani's user avatar
  • 1
-1 votes
2 answers
505 views

Projector Design and lenses

I am working on a project where I need to project a single image onto an object, Originally I was looking at the digital projector route but due to cost and complexity this has been ruled out. I found ...
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