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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2answers
27 views

Transmission rate of vintage Petzval type lenses

Is anyone aware of a transmission rate test for vintage lenses, such as 1800's Petzval lenses?
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1answer
69 views

Canon Powershot SX260 HS problem

The camera was in my handbag along with a bottle of water that I THOUGHT was tightly closed, but instead was dripping. Now the camera will not start without removing and re-inserting the rechargeable ...
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2answers
68 views

Which lens hood should I use for EF-S 18-55mm III kit lens?

I've just bought a Canon EOS 4000D which shipped with a EF-S 18-55m 1:3.5-5.6 III kit lens. Which lens hood should I purchase that is compatible with this lens? Any resources on how to know which lens ...
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1answer
87 views

Can I adapt a Vivitar 34–70mm Macro lens to a Nikon body?

My camera is a Nikon D3400. I got a Vivitar 34-70 mm Macro lens. I tried to mount it on my camera and failed. Can I buy a adapter?
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94 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, ...
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3answers
90 views

What is the safest way to take my DSLR and lenses in my checked luggage?

I will be flying to the Middle East in a few weeks. Turkish Airlines has amended their policy, and they’re not letting anyone take any carry-on. They will move your carry-on to the cargo alongside ...
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1answer
94 views

What is the advantage of using an lens hood? [duplicate]

The main reason I am asking this question is that the people who are pushing the use of the lens hood state that it prevents light from reaching your sensor, confusing the light meter on the camera. ...
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1answer
388 views

What does make a vintage lens not sharp and can we fix it?

Situation I have this Takumar 200mm lens mounted on a Canon 60D with an m42 adapter. I really like the lens because of the bokeh it creates but the photos are so soft. I tried all the f numbers from 3....
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4answers
79 views

Is the focus point a variable or absolute size?

In illustrations of the focus point of a sense, it looks to me to be infinitely small and as a result the resulting convergence of light would not yield an image. If the focus point is NOT infinitely ...
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1answer
102 views

Is this lens fungus or just a speck of dust?

Bought a tokina 11-16 second hand. I thought it was a speck of dust when I use my phone flash to check the lens while trading. But just now when I use a stronger torchlight, I realise there are hairs(?...
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1answer
100 views

D3500 withAF Nikkor 50 mm F/1.8 D incompatible lens

can soneone please give me an idiots guide to how to load this lens and get ot working on my D3500. Ive set the apature to 22 and locked it but when I try to take a picture its just black. I cant ...
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1answer
321 views

Camera dropped and the lens is now bent to one side and cannot zoom in and out

My camera had its lens zoomed out a little when its tripod fell and now it is bent to one side and cannot zoom in or out. I have a Nikon D5300 with an AF-P DX Nikkor 18-55mm 1:3.5-5.6G VR lens. Is ...
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2answers
241 views

How to use spacer rings to change the behaviour of the Nikon 35-70 f/2.8 lens

I recently bought a Nikon 35-70 mm f/2.8 lens with some scratches on the front element. I exchanged the front element with the element of an old lens I had lying around. Everything works fine, but now ...
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2answers
531 views

Need advice on buying a landscape lens

My camera is Canon 6D Mk 2 (full frame). I already have Canon 24–70 mm f/4 and Tamron 70–210 mm f/4 lenses and I'm planning to get a landscape lens in the range of 10–24 mm. I want to shoot astro ...
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2answers
133 views

I shook my camera and lens very hard… Can that cause damage?

I shook my camera and lens very hard. Will this cause damage to the camera or lens? I did this 4 to 5 times. Should I be worried?
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2answers
76 views

Estimating the optical resolution of a lens

In Tony & Chelsea Northrup's recent video titled 5 Lies Camera Companies Tell You, they mention that the optical resolution of a kit lens is often lower than the resolution of the sensor at around ...
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1answer
52 views

upgrading 4000d kit lens to what? [duplicate]

I'm thinking about upgrading my lens. I am currently using a canon 4000d with its kit lens 18mm - 55mm, as I don't have the money at the minute to upgrade both (want to upgrade to a full frame in the ...
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2answers
84 views

Are there two different versions of the Nikon 24-120mm f/4G lens?

I've recently been thinking about investing in the Nikon AF-S NIKKOR 24-120mm f/4G ED VR Lens for landscape photography. I've been looking around to see what a used one is going for, only to find that ...
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3answers
288 views

Upgrading camera or lens or both for landscape? [duplicate]

When taking a landscape photo with a deep depth of view, the image is not sharp, especially the further away it is. Up close sharpness is fine but not far away. I am using the correct aperture and ...
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3answers
123 views

Is it possible to commission a custom lens that would significantly outperform stock lenses?

I know that to get better image quality often requires aspherical lenses, which are expensive to make, so at some point it becomes non-economical to have a lot of aspherical elements in a camera lens. ...
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1answer
44 views

Nikkor 18-140 G DX VRm - what does the letters mean [duplicate]

Just bought a Nikkor 18-140 G DX VRm and am a bit confused regarding the naming. I understand that VR stands for Vibration Reduction, but what does the inclusion of "m" in VRm mean? Also, what does ...
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2answers
85 views

What are these colored streaks in the front element of my lense?

I recently bought a Nikon 50mm 1.4d lens online. When it arrived I noticed colored streaks in the front element of my lens, but couldn't wipe them away with a cloth. Is there any way to get rid of ...
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4answers
425 views

Does reducing the focal-length using a telecompressor on a lens increase the image quality?

I am hoping that by adding a telecompressor, I will be able to reduce the focal length, thus increasing the image resolution/quality captured by the camera. 1) Is it correct to assume that by using ...
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2answers
1k views

How does camera firmware obtain lens distortion correction parameters?

I use an Olympus MFT system and one thing I notice is that for most Zuiko MFT lenses there is significant barrel distortion as seen in the raw images. However, if you look at the jpg's, often they ...
3
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1answer
126 views

What part of Canon 50mm f1.4 is responsible for failure to autofocus?

I have the Canon 50mm f1.4 which had the common focus issue due to deformed inner focus ring. I have straightened the ring and the lens now had full range of manual focus, but Autofocus cannot find a ...
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3answers
93 views

Différence between a long lens design and a telephoto

I was looking at the Leitz Hektor and Ken Rockwell says "This is a conventional long lens design, not a telephoto. Its diaphragm sits right at 135mm from the image plane. The Nikkor lens shown ...
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3answers
107 views

Is the sharpness of imaging different within the depth of field?

Is the sharpness of imaging different within the depth of field? Where is the sharpest? What I am asking is the distance from the lens to the object, not the image distance in the lens. How to ...
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2answers
29 views

is using a screw on ND filter along with GND filers which require a holder possible?

I have a screw on 3 - 7 stop variable ND filter which screws on to the lens. I want to buy some GND soft grads which require a filter holder (This holder needs to screw on to the lens). Am I right ...
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2answers
93 views

What means lens optical characteristics?

I have 12-60 Panasonic lens for mft system. I'm about to buy 12-60 Leica for the same camera, because the photos I do with my current lens feel, smartphone-ish. Depite the lenses are similar in ...
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0answers
65 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 ...
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2answers
57 views

Convex lens, object distance, distance, focal length, in what state is the hyperfocal state? [closed]

Suppose we have a convex lens for a middle school physics experiment, a screen, and an object being imaged, under what state will we find the hyperfocal state? The screen is the imaged screen. It can ...
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3answers
315 views

How oily fingerprints affects lens coating in long term?

I recently bought a new camera and got a big finger print on it's lens rightaway. I used lenspen to wipe it off, however my lens pen was already quite dry, so I'm not sure if it worked correctly. I ...
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0answers
21 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 ...
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2answers
74 views

72mm filter on a 77mm lens

I bought some filters a few months ago with a 72mm thread. Now I find myself buying a new lens with a 77mm thread. I have never used step up/down rings before. What the pro and cons of using an ...
2
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1answer
77 views

EOS-M4/3 Adapter stuck on Sigma Lens?

So I have just bought a new Canon camera and figured my Sigma 24mm 2.8 Superwide lens would be compatible with it, as it is an EF mount. The lens itself was given to me second hand and I had just been ...
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3answers
109 views

Focal length needed to photograph card table

I am attempting to photograph a square card table 35 inches on each side, including some breathing room. I am using a Panasonic G6 with 14-24mm kit lens, at 14mm. On line calculators indicate that ...
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2answers
81 views

“Megapixels” of C/CS mount lenses

So Raspberry Pi got a new camera module and two C/CS mount lenses. Such lenses apparently specify "megapixel resolution", in addition to aperture or focal length. What does it mean? It is quite ...
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1answer
110 views

Which Canon lens to get, EF 24mm f/1.4L II or EF 50mm f/1.2L

I own a Canon 6D Mark II, a Canon 24-105 f/2.8L II. I would like to get a prime Canon lens for portraits that will be mostly full body to group pictures. I have a big family and enjoy taking photos ...
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3answers
256 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 ...
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3answers
102 views

What is the acceptable CoC (Circle of Confusion) of the human eye to directly observe the object? [closed]

What is the acceptable CoC (Circle of Confusion) of the human eye to directly observe the object? The human eye has many cells and high pixels. Should the permissible circle of confusion be small?
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1answer
91 views

Calculating small projection distance

I'm trying to build a small slide projector but (being a lens noob) I'm not able to get a proper focused image. I'm trying to achieve this: I've got a 20mm (biconvex?) lens with a focal length of 50....
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1answer
54 views

For the formula 1 / u + 1 / v = 1 / f, what is infinite depth of field or hyperfocal distance?

For the formula 1 / u + 1 / v = 1 / f, what is infinite depth of field or hyperfocal distance? In other words, when u, v, and f, we have infinite depth of field or hyperfocal distance?
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2answers
191 views

What does focusing mean? What does it have to do with the formula 1 / u + 1 / v = 1 / f?

What does focusing mean? What does it have to do with the formula 1 / u + 1 / v = 1 / f u is the object distance, v is the image distance, f is the focal length. Does focusing mean that both ...
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2answers
78 views

Is it physically possible to mount a manual EF-M lens onto a Canon DSLR without an adapter?

I'm wondering if you can mount an EF-M lens directly on a Canon DSLR body. I'm aware that electronic communication won't work, but I can use manual focus with electronic shutter. If anyone is ...
5
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1answer
671 views

What focal length do I need to get the same field of view as an iPhone SE?

I have a FujiFilm camera (mirrorless crop) with a 35mm lens while iPhone SE has a 4mm lens. What focal length lens do I need for it to get the same field of view as on the iPhone SE?
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2answers
60 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, ...
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1answer
244 views

Lens keeps on zooming a tad bit and lens error

So my family got a Canon Powershot sx220 HS 9 years ago. It was a great camera and had lived that full 9 years. When we got a new camera and left the camera in its place my dad decided to give it to ...
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2answers
466 views

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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2answers
372 views

Which should I buy as a starting prime lens, Canon 35mm f2 or Canon 50mm f1.4?

I am pretty new to photography. I have an APS-C camera, Canon 77D with a EF-S 18-135mm kit lens. I want a prime lens for shooting nice bokeh portraits along with street and day to day life photography ...
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2answers
191 views

Why Does the Point and Shoot Have a Greater FOV than the Canon EOS 350D?

I believe a smaller sensor gives a 'cropped' effect so that a scene viewed from a full frame camera will have only a 'cropped' portion photographed by a smaller sensor camera located at the same ...

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