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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Which of these lenses to choose for a studio project?
I'm preparing for my first professional studio photography project and am seeking advice on the best lens to use for portraits, including full-body shots and headshots. I have a Canon EOS RP with an ...
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Canon 50mm f1.8 VS EF-M 15-45 mm
How much of a difference in IQ of the nifty-fifty against the EOS M 15-45mm kit lens?
I personally have found the kit lens sharp and image looks a bit modern (or not? compared to EF 100-300mm I owned)....
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Preventing (Powershot) lens error
How can I prevent a Canon Powershot lens error? I've had them three times with three different cameras. Twice after dropping, but last time not even that. Note that last time was with a different ...
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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 ...
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What is the advantage to not use names, but only descriptions as unique identifier for lenses? [closed]
If I want to buy a new camera, I use its model number to look at review sites and videos, compare photos on photo websites e.g. flickr and search on price comparing websites and market places where I ...
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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 ...
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What are the theoretical minimum and maximum apertures?
Is there such a thing as a maximum aperture that a lens can be open to? What about a minimum aperture that it can be closed to? Do these concepts even make any sense? Is there a lens with the ...
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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 ...
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How does the Leica R Telyt-R 250 mm f/4 compare to a more modern lens?
Looking for a 300m to use with Leica M digital 24 MB. Use case for the lens: always from a tripod, only at infinity (no autofocus/quick focus needed), photographing objects that are not moving. I ...
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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 ...
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Canon EF 40mm f2.8 consistently sharp across the frame?
Does the EF 40mm f/2.8 lens give sharpness not just at the center but also to the periphery most of the time..? In comparison with the 50mm f/1.8 STM which only very sharp at the center..?
I have done ...
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What causes lens flare from stadium floodlights in my pictures?
When photographing a bright light source (stadium floodlights) a lens flare effect presents itself in the image (shot on an iPhone 13 pro). What causes this effect and how can I accomodate with the ...
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What do all those cryptic number and letter codes in a lens name mean?
When looking at a lens name, there are a lot acronyms describing its features (often specific to the manufacturer).
Examples, Nikon:
Nikon AF-S DX 16-85mm VR f/3.5-5.6G IF-ED
Nikon AF-I 600mm f/4D ...
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Why don't my Fujifilm X-A20 autofocus after putting back on original lens?
I have a Fujifilm X-A20, but I removed its original lens around 4 years ago and have been using a meike lens I bought at the same time. Today I decided to put back the original lens to use it but I ...
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Does my new Helios 44m have fungus?
I just bought a new Zenit 122 camera with helios 44m-6 lens. The lens has something inside and I'm afraid if it's fungus and could infect my other lenses
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How to prevent my waterproof camera from condensation?
I recently bought a HP C-150w for my vacations and the first time I've used it in water it got condensation on the lens as soon as I removed it from water.
I've been reading about how to prevent ...
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Grey circles in the background in photos
All my photos contain grey circles which is especially noticable on light background (e.g. sky). I don't know what is the name of this specific artefact and what is connected to (lens? camera?). So ...
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Why is the area in focus in front of the focus distance narrower than behind it?
I guess the title and the picture explain my question well.
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Is this diagram I've drawn in regards to Depth of field correct?
This diagram is modelled after a video I saw on depth of field formula and its derivation. I have now learnt a bit more regarding Depth of focus and how it refers to "the tolerance of placement ...
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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 ...
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How does background blur and DoF vary with sensor size for a prime lens?
Let's assume I have a prime lens for full frame, with fixed specs (let's say 85mm f/1.8). Changing the lens is not an option, but I have a choice of a full frame camera and a crop sensor camera. The ...
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Is the angle of view actually different on APS-C?
A 50mm prime lens, whether APS-C or Full-frame is designed around the 35mm format. As such, is the angle of view actually different on a DX/APS-C crop sensor or are we just seeing less of the full ...
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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 ...
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Nikon D810 FX- Aperture Question
Can you change the aperture on the camera without the lens or does the lens on the camera have to be connected to the camera?
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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 ...
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Is a Yongnuo 50mm f/1.8f F-mount lens compatible with Nikon F55 or Nikon F80 film SLRs?
I have a Yongnuo 50mm f/1.8N (AF/MF) lens that I use with my Nikon D5600 DSLR (aps-c). I'd like to buy a Nikon SLR film camera, an F55 or F80, and use it with this Yongnuo lens. What issues will I ...
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Screw on teleconverter lens
I have a D5100 with a Sigma 50-200 but I also have a a 2x and 3x teleconverter lens. The problem is that the teleconverters are screw on. Is there an adapter for this?
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Canon PowerShot A810 lens error
I have a Canon PowerShot A810. I don't know what happened to it, but when I turn it off, the lens doesn't close completely, starts buzzing, and after a few seconds, it says "Lens Error".
It ...
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Is it possible that sunlight reflecting off a camera lens could cause sufficient glare to dazzle a driver?
Edited to say: Apologies, it's sunset that these photos are being taken, not sunrise. I hope that doesn't affect the answers that everyone has taken the trouble to answer. Thanks again to all for all ...
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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....
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Why do these images from my Sony a7III have a dark semi-circle on the left side?
I shot these images with my Sigma 24–70 and Sony A7iii, in fog, sometimes pointed into the "sun" (it was not actually sunny but sometimes the lens was pointed towards the direction of the ...
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Does the inverse square law apply to all lights, including light within a lens?
In The Cine Lens Manual by Jay Holben and Christopher Probst pp.46, it is mentioned that the light loses brightness/intensity even within the lens.
This part is discussed right after the inverse ...
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How can I mount an EF-M lens on an EF-S camera?
How can I mount an EF-M lens (22mm, for example) on my Canon Rebel T4i EOS EF-S?
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What Nikon lens is this? What kind of UV-pass beam splitter is this?
A detective challenge for this wonderful community of experts:
I am working on a science museum exhibit about the different ways animals can see light. I am trying to reverse engineer the incredible ...
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What can cause double-vision effect in slightly out of focus areas?
I have an issue with my Canon 70-200 F/4L USM. It is less sharp at 200mm than at shorter range and the objects that are slightly out of focus are rendered twice with horizontal offset. The shutter ...
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Why does fungus form in lenses, and how to get rid of it?
Recently I was using an old Pentax 50mm f/2 that had a quite big green spot, and later I was informed that it was a fungus.
A couple of questions raised from this:
Why does fungus form inside the ...
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Relationship between minimum focusing distance, maximum reproduction ratio, and focal length?
I'm having a hard time understanding these specs of these two Nikon (Z-mount) lenses (or rather, reconciling them).
One of them is the Z-mount 105mm macro: https://imaging.nikon.com/imaging/lineup/...
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Focal length reducer on FF camera (24mm F2)
Lens: Zuiko OM 24mm F2,
Camera: Sony A7S2
What would happen if a focal length reducer (0.71x) is used to adapt a 24mm F2 FF lens, into a FF camera?
The resulting field of view should be ~17mm with ...
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Most suitable lens out of Nikon 18-105 / 18 - 140 / 18 300 Lens
I have Nikon 18-55 and 55-300 mm lenses, and I am looking for an alternate of these two.
There are the lens of the following lenses for the replacement:
Nikon 18-105Mm F/3.5-6.3G - Rs. 19540 (INR.)
...
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What lens for Nikon night landscape / sky photography? [duplicate]
I wanted to take night sky / aurora photos. I have currently been using Nikon D5300 with 18-105mm f3.5-5.6 lens. However I have noticed that it needs either a bit too long to take photos at night or ...
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Can I force the aperture to stay open on macro lens?
I have a sigma 180mm f/2.8 lens, which I bought because it was the largest aperture I could find that focuses around 0.5m See this question for why this was important.. Upon arrival, however, the lens ...
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Lens equivalent depth of field [duplicate]
This question is ported directly from Physics SE, because the guys there believe this is the right place for it.
In digital photography, there's the principle of lens equivalency, according to which, ...
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Do convex lenses make light from different points converge to different points?
I'm starting to study camera and lenses.
Most of the sources online introduce you to the concept of convex lenses, with pictures similiar to this:
This picture just show you that parallel rays (of ...
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How to calculate the required working distance for an object to fill the camera sensor?
I would like to take photographs of a flat object with the camera at some adjustable distance from this object. I would like the object to just fill the camera's sensor.
Given an object of extent $s$, ...
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Im thinking of buying a Nikon D610 do i need to get a specific lens for it to auto focus
Im thinking of buying a Nikon D610 do i need to get a specific lens for it to auto focus? I know Nikon do various lens mounts but not sure which I need to look for
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Close up photos obscure the outside edges of vertical objects in the scene. How can I fix this? [duplicate]
I'm shooting laboratory photos of small (60mm) sized objects. It is essential for me to use the entire camera sensor to achieve adequate spatial resolution, so I am putting the camera as close as ...
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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....
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Does autofocus in iPhone changes focal length? [duplicate]
I was wondering how auto-focus works in mobile cameras. I understood that, mobile phones uses either 'contrast based' or 'phase-detection based' algorithms to find the optimum length position for ...
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What is the better gift for the beginning bird photograper? Used 500 mm F 4.5 prime vs 100-600 mm F 4.5 - 6.8 zoom
I want to buy a gift for the beginning bird photographer. She currently uses and has experience with 70 - 250 mm lens (the camera accepts Canon EF S). She says the birds just fly away as she ...
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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 ...
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