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Author Topic: Is There Such Thing As a "Best" Normal Lens for Crop?  (Read 9230 times)

JohnDizzo15

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #15 on: September 09, 2013, 12:35:03 PM »
Thank you for confirming my "oh **** it" moment.  Added a lens hood and polarizing filter to the mix and will, of course, post pictures.
I think almost all lens/camera purchases are "oh ****it" moments for most people, coz there is always a "better" lens out there that we could/might have bought, so it is comforting when many people agree with our purchase decision ... but at the end of the day what we make of it that matters ... I've seen some very talented people who do awesome work with the el cheapo 18-55mm lens ... that said, I think you made a wise decision to go with the 17-55 f/2.8 IS, I had that lens for quite some time and loved it, I used to use it with my 7D & 60D cameras ... all of them (including 17-55) are sold to fund my 5D MK III last year. Congratulations on your 17-55 f/2.8 IS, may it serve you well.

+1  doing awesome work with you've got is what matters.

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #15 on: September 09, 2013, 12:35:03 PM »

Cory

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #16 on: September 09, 2013, 01:02:40 PM »
Cory - I know you have already made your purchase which I would have to say was probably the safest choice. However, I would also give some thought to/or try out the Sigma 18-35 f1.8 (29-56mm equivalent). It covers what most people like to consider normal (between 35-50), it is faster than the 17-55, and has more current tech as far as lens coating and elements go. As a result, it supposedly has very minimal chromatic aberration for a lens in this FL range with an aperture that wide. This would only make sense though if you were open to getting another Sigma lens.  To answer the other part of your question for a prime (my personal preference), would be the 35/2 IS. IQ is really good, it's faster than any zoom (minus the new Sigma), it fits your need for "normal", and it is the fastest lens Canon produces next to the 200mm that has IS. Again, this lens is fairly new and uses modern coatings which has helped a lot with CA compared to the 35L and the older 35/2. Also, it is an EF lens that you will be able to carry over with you should you decide to make the move to FF one day (it also happens to be on sale for $599 right now).

I use the 35/2 IS on the 5D3/EOS M and love it in both instances. I kept the 35L for the first month after picking up the 35/2 IS and eventually realized that the L was only going to collect more dust. Another affordable purchase that really exceeded my expectations.
That's a good call, I think, on the 35 2.0 IS although I swayed over to the "flexibility" part of the compromise.  I think that might be what I'll go with if I move to full-frame one day. 
Thanks.
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albron00

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #17 on: September 09, 2013, 04:06:29 PM »
17-55mm

alexturton

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #18 on: September 09, 2013, 04:54:57 PM »
I used the original sigma 30mm 1.4 for a number of years. Always thought it was a fantastic little lens in AF speed, accuracy and sharpness. on crop was about 50mm which is standard enough.
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pwp

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #19 on: September 09, 2013, 08:02:19 PM »
Is there such thing as a best normal lens (prime or zoom) for crop? 
If you're choosing a lens that basically stays on your camera, ready for a variety of situations then it's got to be a zoom. Primes are fine but as a primary lens the zoom rules.

You've said it yourself...the 17-55 EF-S or the 15-85 EF-S. After a dozen years with FF and APS-H I got my first APS-C body a fortnight ago. It's a tiny SL-1 paired with the 15-85 EF-S. I wanted something smaller & lighter for travel. On APS-C the 15-85 makes a great package.

"Best" is a big, broad, diverse place. What is "best" for you depends entirely on your unique style.

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2n10

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #20 on: September 09, 2013, 10:42:28 PM »
Congrats on your 17-55 you should enjoy it greatly IME.
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Pi

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #21 on: September 10, 2013, 12:36:52 AM »

stefsan

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #22 on: September 10, 2013, 03:46:28 AM »
"Best" is a big, broad, diverse place. What is "best" for you depends entirely on your unique style.

Exactly! For a lot of things I use the 15-85 on my 7D because it has a very nice zoom range. There is a price to pay for every lens choice though. You'll have to weigh limiting factors such as aperture (e.g. the 15-85's widest aperture is f3.5 on the wide end) and optical aberrations (making corrections in pp can be cumbersome and time-consuming) against benefits like the versatility. In the end, what the "best" lens is for you depends on your specific needs and may vary with different situations.
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Bruce 101

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #23 on: September 10, 2013, 08:17:16 AM »
Add the 18-135 STM to your short list (with the 15-85 nothing optically lost in that comparison) and the 17-55.

curtisnull

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #24 on: September 10, 2013, 08:49:59 AM »
Going back to my photography school days almost 30 years ago. A "normal" lens is defined by the film size or sensor size. That is the diagonal of the sensor size in mm is equal to the "normal" lens size in mm.

Using the Pythagorean Theorem which is a square + b square = c square. Therefore the APS-C sensor on the 7D for example which is 22.3 mm x 14.9 would result in a normal lens of 26.82 mm.

A full frame sensor would have a "normal" lens of 43.27 mm.

Anything greater than the "normal" lens which is defined by the sensor size would be considered a telephoto lens and anything lesser than the "normal" lens would be considered a wide angle.

When I was using an 8x10 view camera in photography school, the normal lens for that camera was a 12.8 INCH lens or a 322 mm lens. I think the actual lens we used was a 300mm.

In theory a 26mm lens on an APS-C would give the same field of view as a 43mm on a full frame and the same field of view as a 322mm on an 8x10 view camera.

My Hasselblad used an 80mm as a normal lens.
1Dx••5D3••300/2.8L IS II••135/2L••100/2.8L IS Macro••24/1.4L II••70-200/2.8L IS II••24-70/2.8L II••17-40/4 L••600EX-RT••lots more Canon stuff.

paul13walnut5

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #25 on: September 10, 2013, 09:00:37 AM »


Using the Pythagorean Theorem which is a square + b square = c square. Therefore the APS-C sensor on the 7D for example which is 22.3 mm x 14.9 would result in a normal lens of 26.82 mm.


Hence my choosing of a 28mm and recommendation of it.

Pi

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #26 on: September 10, 2013, 09:15:30 AM »
Going back to my photography school days almost 30 years ago. A "normal" lens is defined by the film size or sensor size. That is the diagonal of the sensor size in mm is equal to the "normal" lens size in mm.

Using the Pythagorean Theorem which is a square + b square = c square. Therefore the APS-C sensor on the 7D for example which is 22.3 mm x 14.9 would result in a normal lens of 26.82 mm.

A full frame sensor would have a "normal" lens of 43.27 mm.

This is a rather dogmatic view of what "normal" means. "Normal" is supposed to mirror human's field of view, which is close to fisheye with terrible resolution off center, and long telephoto with good resolution. When comparing different aspect ratios, comparing the FL to horizontal or vertical size becomes inconvenient; then the diagonal is more convenient as some kind of average of the two. One can also take the square root of the area instead.

Once we decide that the we prefer the diagonal as a linear measure of the size of the film/sensor, then FL=diagonal is as "normal" as FL=1.12345*diagonal. Choosing it to be exactly equal to the diagonal sounds a bit mystical, so it must be right.  :)

If you really want to know what "normal" means, this can only be determined with experiments with people. It is tricky because the AOV depends on the distance to the print, and the latter would depend on how large the print is, in a non-linear way.

Yes, I know what wikipedia says.

mrsfotografie

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #27 on: September 10, 2013, 11:51:34 AM »
30 mm.

My Sigma 30mm F2.8 EX DN is just great on (1.5x) crop (Sony NEX) ;)
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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #27 on: September 10, 2013, 11:51:34 AM »

aroo

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #28 on: September 10, 2013, 12:24:53 PM »
Setting aside the question of a "normal" human field of view (I personally can't imagine a rectangular sensor producing anything like it), I've noticed that about 50mm on crop or 70mm on FF seems to match the magnification of my eye. In other words, if I look at an object with my naked eye and then through the viewfinder, it appears the same size in my field of vision. Does anyone know the correct term for this "normal" magnification concept?

keithfullermusic

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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #29 on: September 10, 2013, 12:34:22 PM »
Is there such thing as a best normal lens (prime or zoom) for crop?

No.
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Re: Is There Such Thing As a "Best" Normal Lens for Crop?
« Reply #29 on: September 10, 2013, 12:34:22 PM »