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4
votes
2answers
105 views

Does Stopping down affect the performance of the sensor's AA filter?

I noticed a while back that with a lens stopped right down (say f16-22), any dust on the sensor becomes much more noticeable and "focused", and wide open (say f1.4) it is practically invisible. This ...
1
vote
2answers
1k views

Canon Sharp Zoom Lens for Fashion Photography

I am looking to buy a Canon L lens, preferably a zoom to cover various ranges and focal points. I had a look on the new Canon 24-70f4L and it looks fantastically sharp. However, someone mentioned on ...
4
votes
1answer
141 views

Do elements drift out of place with age in zoom lenses?

I have used a Nikon 18-200 for several years and probably have 30K or so photos taken with the lens. It appears that over time the lens is less consistent in the sharpness of the lens. I have heard ...
2
votes
3answers
16k views

How do I choose between 24-70 f/4 and 24-105 f/4 Canon lens?

I am getting a new medium range zoom lens for general use and occasional weddings. This new 24-70 f4 was top of my list until I watched this review: Canon 24-70 f/4L IS vs Canon 24-105 f/4 IS - ...
11
votes
6answers
1k views

Do lenses lose sharpness when they age?

I was reading this answer where it mentions, "..it's a lens that can lose sharpness as it ages.." and was wondering if this is true and if yes, true for all lenses. Reasons as to why this happens and ...
2
votes
3answers
429 views

Which camera/lens combination achieves the highest possible image quality for macro?

Doing lots and lots of research I have a hard time time finding the ultimate answer to this question. I would like to shoot macro and products and aim for maximum sharpness and reproduction. Maximum ...
13
votes
3answers
550 views

Distortion/quality when using a full frame lens on a crop sensor camera

I am looking for a sharp, affordable wide-angle prime for my Nikon D7000, primarily for landscape shots. I am really interested in the Samyang (aka Rokinon, Bower) 14mm f/2.8 lens due to its ...
3
votes
2answers
7k views

What lens should I buy to get sharp pictures from my D7000?

I have just changed my D200 for a D7000 with the kit 18-105 lens. However, the quality of the pictures is not comparable with those of my D200: not as sharp, not as much definition and overall a ...
1
vote
3answers
261 views

Do lenses need to be made with more precision for Hasselblad's 60MPix camera?

One of Hasselblad's cameras has a Double-Full-Frame sensor. Does that mean that the lenses needed for it are incredibly complex to build (to have a sharp, high quality, abberation free image on the ...
4
votes
3answers
1k views

Are prime lenses sharper than normal or telephoto zoom lenses?

Example: The prime lens Nikon 1.4F G is said to be very sharp at F3.5. So, if I compare that with the normal or telephoto zoom lens's F3.5, will the level of sharpness be same? If no, then will the ...
8
votes
1answer
193 views

Can the sharpness of the lens be evaluated with no relation to the DSLR?

When I read lens reviews, they all say that one lens is sharp, another is very sharp, another one is not sharp at all, etc. For me, it doesn't make sense to just say that a lens is sharp or not, with ...
3
votes
4answers
3k views

Why am I getting soft images with my Sigma 24-70 f2.8?

I recently purchased a Sigma 24-70mm f2.8 lens which I am using on a Canon 40D body. Around 8 of 10 shots were soft, regardless of subject matter. Exposure, white balance etc. all looks fine. I only ...
8
votes
4answers
859 views

Why buy an intentionally soft lens?

While reading some reviews of older lenses, I keep reading "It's soft wide open, but that's not always a problem with portraits." Over my rather short time in photography thus far, I've come to ...
3
votes
1answer
2k views

How do the Pentax 18-55mm and 18-135mm compare in image quality?

I've been reading a lot about the Pentax DA 18-135mm lens and its performance compared to other lenses. I've heard that this lens is very soft at 135mm regardless of aperture. However, I've also ...
12
votes
4answers
744 views

Is there a noticable difference in sharpness between a 1.8 lens and a 2.8 of similar design?

I recently bought a second-hand Carl Zeiss Jena PANCOLAR MC 1.8/50mm Lens off eBay (still waiting for it to arrive though) and am going to mount it to my Canon 7D via a M42 adaptor. I primarily shoot ...
7
votes
4answers
476 views

Were lenses for film designed to focus different colors at different depths, and what does that mean for digital?

I was reading the book Adobe Photoshop CS5 for Photographers: The Ultimate Workshop by Martin Evening & Jeff Schewe (Focal Press. 2011) and read this paragraph about film lenses and DSLRs: … ...
9
votes
2answers
2k views

How can I/should I check the sharpness of my camera lens?

The sharpness of a lens is a major concern for most photographers. This might be because we are worried about a defect in the lens, a problem with our technique or a problem with the camera. Or we ...
11
votes
1answer
3k views

Does image quality of a lens depend on the camera used?

I recently bought a Canon 50mm f1.8 for my Canon 1000d. But, I find that the images are not as sharp as those I saw in the reviews or any other images taken using other cameras like the 550d and ...
1
vote
2answers
442 views

Am I being unrealistic about image quality expectations from Canon 70-200 F/4 USM IS L Lens?

I'm shopping for a 70-200 F/4 USM IS L, and took a few test shots with it. Here's a full resolution jpeg, and a 100% crop with a focus point highlighted. It was shot handheld with IS on at 70mm / F4 ...
5
votes
4answers
2k views

Why does the cheap kit lens seem to be sharper than the expensive L wide-angle?

So recently, I was just browsing through Canon's product lists and found the 17-40 f/4 L to be quite interesting, although I will not buy it anytime in the near future. Still, I decided to make some ...
4
votes
5answers
1k views

Are Sigma DC 18-50 1:2.8 EX sharpness problems common with wide apertures?

I got this Sigma DC 18-50mm f/2.8 EX MACRO HSM lens few weeks ago, but I noticed considerable sharpness problems with wide apertures. Until f3.5 (or even f4.5) this lens can't really be used. I would ...
25
votes
4answers
4k views

How do you find out the “sweet spot” of a lens?

I've tried googling this, but have never found a satisfactory answer. I've heard the term "sweet spot" thrown around by some photographers to mean the f-stop of a lens which results in the highest ...