Watching Over

by Vian Esterhuizen

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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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3
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1answer
130 views

Macro lens ratio not as expected

Using a Canon 550D with a EF 100mm f/2.8 Macro USM lens, I can make a 1:1 macro photo at shortest film plane to subject distance of 310 mm, thus getting 22 mm of a scale on the APS-C sensor, which is ...
0
votes
2answers
69 views

What are some tips to keep a lens from rolling on its side when kept horizontally on a table?

Assuming we don't prefer to keep the lens vertically when not attached to a camera. I'm broadly referring to adding some sort of an attachment to keep it from rolling and falling of a table. Or any ...
0
votes
0answers
31 views

Technical book or resource (non-creative) [duplicate]

I'd like a resource from which to learn about technical, non-artistic/technique aspects, such as: Onion ring bokeh, and what causes it. Choosing of lens hoods, Why chromatic aberration happens/why ...
10
votes
4answers
1k views

Is there a correct way to swap lenses?

I am regularly swap between a telephoto and a kit lens on my Olympus 500. Normally I just switch over the covers and cap to the non-use lens and drop it in my bag but today it was particularly ...
11
votes
3answers
2k views

Is it risky to change lenses in the cold?

I am generally a lazy person, so I am extremely averse to changing lenses on my camera in the cold. I am concerned about my fingers getting cold, but here I read that condensation is extremely ...
0
votes
2answers
130 views

Wide Angle Lens recommendation for canon 70D (cropped sensor camera)

I am interested in landscape and have a 40mm f/2.8 pancake lens but finding it does not capture enough and would like to purchase a Wide Angle lens. I am find ing the prices for the Canons too much ...
-1
votes
2answers
118 views

What does f/4.5-5.6G stand for on a Nikon Lens? [duplicate]

Can you please explain me what is 4.5 - 5.6G in a lense description.And how it is different from other generation of like 3.5G or 6.5. "Nikon AF-S DX NIKKOR 55 - 300 mm f/4.5-5.6G ED VR Lens"
3
votes
4answers
662 views

Would a 85mm lens have allowed me to blur the background better in this photo of a DJ in action?

This is the picture I took: I had a Nikon-D610 and a 24-70mm f 2.8 lens on it and I used it on Manual mode and metering was f:2.8, Shutter speed: 1/20 sec and Focal length: 62mm. Also I was as ...
0
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0answers
121 views

Are mobile phone camera lenses good enough to support 20MP sensors?

With mobile phone cameras approaching 20 MP while maintaining small sensor sizes, pixels dimensions are typically around 1 μm or lower. What about the lenses? Are they good enough to produce an Airy ...
1
vote
4answers
529 views

Is the camera sensor or the lens the limit to resolution?

I have a pretty high res sensor on my camera, but sometimes I have the feeling my lens doesn't even get to this resolution. How can I tell if my camera sensor has not enough resolution or if the lens ...
0
votes
0answers
48 views

Can I use old Pentax-mount Vivitar lenses on Nikon DSLR? [duplicate]

I have some old Vivitar lenses (some still Boxed) that bear the marking PK-A/R and PK that I used on my old Pentax K mount SLR. Can I use them with my Nikon D5100 DSLR with a K to Nikon adapter? I ...
1
vote
1answer
78 views

Blurred corner problem

Nikkor 18-105 VR lens. What could cause such blurry left bottom corner? Is there anything more that I can do to diagnose problem? I have already tried the lens on different body with same result. ...
0
votes
0answers
82 views

Converter and lens combination to try on sony a7 or a6000

I have bought an a6000 with the kit lens, and it takes nice pictures but I miss some things that I was able to do with my Canon DSLR and old lenses. I have kept some of my Canon lenses. Should I buy ...
2
votes
3answers
110 views

Which EXIF tag to set for the 35mm equivalent focal length?

For a manual lens (*Rokinon 8mm f/3.5 Fisheye) I want to add the focal length information to the EXIF metadata in the resulting pictures with exiftool. I use the lens on a Canon 60D body. Obviously I ...
8
votes
2answers
439 views

Does lens age affect color produced?

I came into some discussion with my friend, and my friend said that age may affect the color produced by the lens, i.e., a newer lens produce better color than an old lens (of the same model). Is this ...
0
votes
0answers
124 views

35mm Loxia vs Sonnar, IQ Comparison

How do the Sony Zeiss Sonnar 35mm f/2.8 and Zeiss Loxia 35mm f/2 lenses compare on the Sony a7 series cameras? (I am interested more with image quality than ergonomics, build quality, price, etc.) I ...
0
votes
1answer
121 views

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length?

Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length (the kit lens for my T3i)? I'm looking for a cheap lens that offers a wide ...
0
votes
2answers
98 views

Why are lower focal length lenses wider? [duplicate]

Most of the wide angle lenses are lower focal length and the telephoto lenses are of longer focal length. Can someone explain (scientifically) to me how shorter focal length of the lenses is help to ...
2
votes
3answers
116 views

What is the best lens for shooting flat surfaces?

For a long time, I was making closeup photographs of flat surfaces using my cropped DLSR and Canon EF 50/1.4 lens. The scene was illuminated by an external flash. The focusing distance was the closest ...
6
votes
1answer
110 views

How is Nikon's PF optics different from and similar to Canon's DO optics?

Nikon has just announced a new 300 mm lens featuring a new technology called "PF" or "Phase Fresnel." This has been compared to Canon's existing DO (Diffractive Optics) lenses such as the 400 mm f4 ...
2
votes
3answers
241 views

Why is my zoom lens blurry at focal range past 100mm?

I recently purchased a used Canon 55-250mm IS lens and it works nicely at 55mm(even with lower shutter speed, and f/4 aperture), but turns out quite blurry at longer focal lengths, even with a shutter ...
1
vote
1answer
83 views

How do add on macro smartphone lenses allow you to take macro photos?

It may sound obvious, but how exactly does an add on macro lens allow you to take close up photos? Can someone give technical reasons? I'd like to know the physics behind add on macro lenses and how ...
4
votes
4answers
197 views

Is it possible to get smaller aperture with diaphragm in front of the lens?

My camera has narrowest aperture of f8. To increase depth of field, could I place an opaque "filter" or lens-cap with a small hole, e.g. 12 mm for f16, on the lens? I realize that at short f.l. the ...
0
votes
0answers
64 views

How does the Tamron 70-200mm F/2.8 without VR/IS compare to the Nikon 70-300mm F/4.5-5.6 VR?

I'm looking at two different lenses. The Tamron AF 70-200mm f/2.8 Di LD IF Macro Lens. ...
1
vote
1answer
51 views

Does Pentax make a lens adapter to fit Olympus lenses?

I have some Olympus lenses I found at an estate sale, does Pentax make an adaptor to fit these?
2
votes
1answer
54 views

What is the diameter of my lens? [duplicate]

So recently I bought a used lens - Canon ef 28-80mm f/3.5-5.6 usm with the metal mount but it came with no lens cap and I want to buy one now but I can't see the diameter of the lens on it anywhere ...
2
votes
2answers
136 views

Whatever happened to dust?

Back in the day, lens cleaning was a front and center concern, with everyone discussing their preferred methods and products. I had a blower brush, tissues, and fluid as part of my kit. But now, ...
0
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0answers
43 views

Albinar's compatibility with Canon t5

So I have an Albinar ADG 28-80mm lens, that I have acquired, and I was wondering what mount adapter would be required for it to work on either the Canon EOS Rebel T1i or T5, I have both. Thanks!
0
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0answers
26 views

How does the Minolta AF 24 mm f2.8 compare to the Sigma AF 24mm F2.8?

I have an APS-C Sony A77 and I am looking for a 'walk around lens' which is wide enough to take around the city and fast enough for lower light conditions, ideally below 200€ german. With these ...
0
votes
0answers
26 views

Canon PowerShot SX160 prevent lens opening due to accidental power on?

Just bought my daughter a SX160 as her first real camera and I neglected to check if there was a way to prevent the lens from opening on an accidental power on. My old PS A710 had a slide button for ...
0
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1answer
146 views

What are the advantages and disdvantages of the Canon 18-55 IS MKII vs IS STM kit lenses?

I'm trying to figure out the difference between the IS MKII lens and the IS STM lens. Specifically, I am looking at the Canon EF-S 18-55mm f/3.5-5.6 lens. On that Amazon page, there are three ...
2
votes
3answers
117 views

Polariser and ND together

I'm an amateur landscape photographer, have some cheap ND filters but I'd like to take it to the next level and invest into more advanced gear. I was thinking of getting a Lee basic kit which I've ...
1
vote
2answers
207 views

Does the lens I just bought have a fungus?

I bought a used Sigma lens on ebay for my back up camera and it was said to be in "mint" condition. I got it today and look it out of the box to look at it and I was horrified to see that the front ...
3
votes
2answers
102 views

Nikkor 70-200 2.8 VRII - Does Autofocus <5m really work?

some days ago I daring duck had approached while I was taking photos of her and her friends in a pond. I was testing my new 70-200 2.8 VRII and I was a bit worried about the autofocus while working ...
0
votes
4answers
191 views

How do I take a “projector output” photo, showing the beam from my car's headlights?

Auto enthusiasts have a thing called a "Projector Output" photo, and its samples are something like this: mostly lights of the cars on a wall at night: And here is a sample shot I did: At full ...
0
votes
2answers
649 views

So my iPhone 6 camera lens is as wide as my full frame 35mm DSLR lens?

I am trying to understand what is the deal with "full-frame" and what difference it makes, so did a silly test: I sat at my bed and aligned the iPhone 6 camera with the door of the room and took a ...
36
votes
9answers
9k views

Do professionals really never use a 24-70 lens?

I was reading lens reviews on the Rockwell site — mostly because it came up as first result in Google search — and he was saying professionals don't need and don't use mid-range zoom lenses like 24-70 ...
0
votes
0answers
40 views

what qualities should I be looking for in a long range lens [duplicate]

I am trying to get a long range lens for taking pictures of animals. I have read many questions and realize I need at least a 300 mm and I know they all depend on price...I'm not to go crazy with ...
1
vote
1answer
53 views

General guidelines on choosing a lens for an image sensor [closed]

Not sure if this is the right place to ask this question, but here it is: I am trying to get up and running a VGA image sensor: 2755um x 2050um image area with 4.2um x 4.2um pixels and 640x480 ...
1
vote
0answers
60 views

Where is the focal point of a camera lens? [duplicate]

If the distance between the center of the lens and the film is called Focal length, does that mean the focal point of the camera lens is located on the film?
2
votes
4answers
142 views

What should I look for in lenses for long range and close up animal and natural shots?

I am looking at trying to buy a long range lens for shooting animals and nature. I'm kinda new to photography and am not sure which brand or size I should be looking for. What features are important ...
14
votes
4answers
3k views

Why does a small change in focal length of two lenses make a $1000.00 difference in the price?

I was looking at some lenses and the famous 24-70mm f/2.8G ED AF-S Nikkor Wide Angle Zoom Lens is almost $2000.00. Then, I also found this one: Nikon 28-70mm f/2.8D ED-IF AF-S Zoom Nikkor Lens and ...
0
votes
0answers
43 views

Are there any hardshell covers / protectors for lenses?

I'm a concert photographer, and I tend to end up in mosh pits quite a bit. I've mastered the art of shielding my camera from fists and beers, but I have been starting to see some wear and tear. Are ...
2
votes
2answers
182 views

Which lens for a milky way photo

I have a Nikon D7000 and don't know whether my 50mm 1.4 or 17-55m 2.8 lens would be better. I was automatically going to go with the 50mm lens, but then I was reading up on how I can use a longer ...
3
votes
3answers
157 views

What criteria to consider to match cameras and lenses for shooting people at parties?

I normally don't like shooting people that much, because I like to experiment with settings, lenses etc. to get a result that I like, so it helps when the subject doesn't move (Mountains and buildings ...
3
votes
3answers
637 views

What can cause blurry and out of focus images on a Nikon D5300 in no flash mode?

I am using a Nikon D5300 with 18mm-300mm lens. My problem is that the camera is not working properly in "No flash" mode - in all other modes it's working well. Mostly I am using manual settings, but ...
0
votes
0answers
74 views

Samsung NX1000 focus ring does not work, can't get off manual focus mode either

I bought a used Samsung NX1000 last night, everything is great but it's stuck on Manual Focus mode. The Single Auto-Focus [SAF] and Continuous Auto-Focus [CAF] are greyed out no matter what I try. ...
1
vote
2answers
55 views

D90 and lenses upgrade [closed]

I have a Nikon D90 and currently use the following lenses: Nikon 70-300mm VR Ed IF Nikon 55-200mm DX AFS Nikon 18-55mm DX Sigma 70-300mm APO Macro My question, is the Nikon 55-200mm unnecessary ...
4
votes
2answers
411 views

How durable are zoom lenses?

I've heard that zoom lenses after some intensive usage become "sticky" and difficult to operate. What's the aproximate durability for a zoom lens like a Canon EF-S 18-135, shooting ca. 1000 - 2000 ...
2
votes
0answers
43 views

Lens adaptors for a 30mm ring size wearable camera. with either 4x 8x or 12x fixed power

I have what is called a wearable camera. I am looking to improve and enhance my view as a better live eye look, rather than the distant view all wearable's have in today's market. The camera has a ...