Questions tagged [diffraction]

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5
votes
2answers
76 views

What kind of lenses with a “slightly different diffraction behaviour” were used in “large format photography in the 1980s”?

Referring to an interview with a lens expert (Krolop&Gerst Objektivreihe 17/32), discussing diffraction limits. "Es gibt ein paar Spezialobjektive die haben ein bisschen anderes Beugungsverhalten,...
6
votes
4answers
735 views

Can the diffraction limit be overcome with superresolution?

As the title says, can the diffraction limit be overcome with superresolution techniques? Or is this the absolute hard limit in optical photography without making special assumptions? If this is the ...
0
votes
1answer
164 views

What is the Nikon D3200's diffraction limit?

I'm new to the world of macro so do bear with me! I shoot pictures of fish through aquariums, so normally this means the lens is always perpendicular to the glass surface to avoid blurring. However ...
7
votes
6answers
1k views

Does sensor size impact the diffraction limit of a lens?

My understanding of diffraction, is that with a small aperture the 'airy disk' (which I understand is the pattern light from a given direction relative to the lens will form on passing through the ...
9
votes
5answers
801 views

Circular polarizer works great at shorter focal lengths, but significantly degrades the image at longer lengths. Why?

I bought a cheap CP recently to play around with, and noticed an interesting phenomenon: Using it with my 24mm lens on full-frame, images turn out tack-sharp - there is hardly any difference in ...
2
votes
2answers
645 views

Haida ND 3.0 (10 stops) filter issue or normal blur?

Yesterday I had a chance to try for the first time the Haida ND 3.0 filter I bought on Amazon with my filter holder. This is this filter: Haida ND 3.0 HD2505D: http://www.amazon.com/gp/product/...
7
votes
1answer
604 views

Can deconvolution reverse softness caused by diffraction?

I'm aware that diffraction limits the maximum optical resolution of any lens, especially when stopped down to very small apertures. Some camera manufacturers, such as Pentax and Olympus, have ...
1
vote
3answers
1k views

How does sensor size impact depth of field and diffraction for macro photography?

Macro photographers often stop down to very small apertures to maximize the razor thin depth of field when operating at such close focus distances. Smaller sensors have greater depth of field than ...
7
votes
5answers
1k views

Unable to get sharp landscape picture

I'm facing often the same kind of trouble when taking landscape pictures... I end up with a picture that could be great but that is totally not sharp ! Example : I set up the maximal focal distance ...
5
votes
4answers
6k views

Are there any lenses have smaller apertures than f/32?

While most photographers prefer fast lenses that range down to f/1.2, are there any lenses that go smaller than f/32? If there are, what is so special about those lenses that an aperture of f/32 ...
2
votes
1answer
874 views

Does increased resolution compensate for diffraction?

Given a sensor size, the diffraction limit (and cut-off) are determined largely (entirely?) by the density of pixels on the sensor. With the trend of ever-increasing megapixel counts, this means that ...
6
votes
3answers
685 views

Is there any way starburst diffractions could be captured with a fixed f/2 smartphone lens? [closed]

There's been some controversy surrounding the publicity camera samples for Nokia's new flagship smartphone, the Lumia 920. First it was shown (and admitted by Nokia) that the stabilised video footage ...
5
votes
1answer
226 views

Is diffraction an issue with macro lenses?

I'm looking to try out macro photography and have a rental of the Canon 100mm 2.8L IS and the MT-24EX flash to try out on my Canon 7D. I've been reading that with the flash, you can stop down to ...
25
votes
5answers
914 views

Do very short shutter speeds result in diffraction?

I'm curious if very short exposure times (say 1/8000 or even 1/16000) would cause noticeable blur due to diffraction. To achieve very fast shutter speeds focal-plane shutters start to close the ...
11
votes
1answer
2k views

Does focal length affect diffraction, in addition to aperture?

The reason I ask is that f/18 on a 24mm lens = 1.5mm, and f/18 on a 180mm lens = 10mm. I thought diffraction is due to the small physical size of the aperture, rather than the f-ratio, yet I only ever ...
24
votes
4answers
3k views

Do smaller apertures provide more depth of field past the diffraction limit, even if peak sharpness suffers?

In Understanding Exposure (3rd edition, on page 48), Bryan Peterson has what might be called a rant against modern on-line conventional wisdom about diffraction limits. Answers on this web site are ...
63
votes
7answers
19k views

What is a “diffraction limit”?

I've seen the term used, but what is a "diffraction limit", when should I worry about it, and what undesirable effects are a result of it ?