Wide angle on a 40D (APS-C)

Apretext

Apretext

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What effect would putting an EF wide angle on a crop frame body?

At some point I would like to get a wide angle lens, so I'm wondering if I should only look at EF-S fit lenses, or whether an EF would be fine, as obviously that opens up a lot more possibilities.
 
It'll be as wide as the mm figures tell you! A 17mm EF lens will give you the same FOV as a 17mm EFS lens for example.

Look at 10mm lenses for ultra wide.

Why would an EF lens open more possibilities? Quite the other way around I'd say. The Canon EFS 10-22 is arguable the best ultra wide for a canon crop and its EFS/crop only.
 
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Isn't the 10-22 fairly pricey? I was thinking that being able to use EF lenses would mean that Sigma, Tamron, etc lenses would be available, for a lot less.
 
The cheapest(?) probably best value UWA lens would be the Sigma 10-20mm f/4-5.6. It does suffer from QC a bit though, so make sure you find a sharp copy before you buy. I bought the Sigma but I think mine was a touch soft so only had it a couple of weeks before replacing it with the Canon 10-22mm, much better! The Canon isn't actually too much more than the Sigma so I'd say go for that.
 
Go for the Canon, it's a superb lens.

Had I not gone to full frame I would never have sold mine. It was easily as crisp as my 17-40L and compared to the price of third party lenses it's good value.
 
Razor-BladE said:
The cheapest(?) probably best value UWA lens would be the Sigma 10-20mm f/4-5.6. It does suffer from QC a bit though, so make sure you find a sharp copy before you buy. I bought the Sigma but I think mine was a touch soft so only had it a couple of weeks before replacing it with the Canon 10-22mm, much better! The Canon isn't actually too much more than the Sigma so I'd say go for that.
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Rough prices are Sigma £350 Canon £600 so there is quite a difference, I'm sure the Canon is the better lens but I've had some good results from my Sigma so if the budget doesn't stretch to the Canon, the Sigma is a good option
 
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The effect will be whatever the focal length is regardless of whether it's EF or EF-S. Just think of EF or EF-S as a different fitting. You can use either on your crop but only EF on Full frame as the lens protudes back to far and would hit the mirror..

A 10mm EF-S lens on a 1.6 crop body would equal a 16mm EF lens on a full frame body. A 10mm EF-S lens on a 1.6 crop would be wider than the 16mm EF lens on the same crop body.

I was very happy with my 10-20 Sigma when I used one on a 40D
 
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dinners said:
The effect will be whatever the focal length is regardless of whether it's EF or EF-S. Just think of EF or EF-S as a different fitting. You can use either on your crop but only EF on Full frame as the lens protudes back to far and would hit the mirror..

A 10mm EF-S lens on a 1.6 crop body would equal a 16mm EF lens on a full frame body. A 10mm EF-S lens on a 1.6 crop would be wider than the 16mm EF lens on the same crop body.

I was very happy with my 10-20 Sigma when I used one on a 40D
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Ok, I think that makes sense, so how about the other way round, if I use a EF lens on a crop frame body?
 
EF and EF-S are just the codes for the fitment, they have no effect on the focal length.

If you want an ultra wide lens on a crop body you want something like 10-20mm regardless of whether it is EF or EF-S

A 10mm lens on a crop body is equivalent to 16mm on a FF body (10mm x 1.6)


On a full frame camera the equivalent field of view of a 10-20mm wide angle would be a 16-35mm but that 16-35mm lens on a crop body would be roughly 26-56mm (16-35mm x1.6)
 
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Apretext said:
Ok, I think that makes sense, so how about the other way round, if I use a EF lens on a crop frame body?
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It will make no difference - other than it will fit fine and not be as wide as when mounted on a full frame body as the image is 'cropped'

That's why a wide angle EF lens like the 17-40 is wide angle on full frame but an EF-S lens like the 10-20 is wide angle on a crop.

Just look at the focal length numbers.

I use a EF 17-40 lens sometimes on a crop.

I use a EF-S 10-20 lens sometimes on a crop.

Forget the EF / EF-S part

The 17-40 at is widest is just a bit wider than the 10-20 at it's longest. They overlap by 3mm of focal length.
 
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EF and EFS are only types of mount, both work on a APS-C Canon body. The focal length will be whatever is written on the lens.... the *effective* field of view will be focal length times crop factor - 1.6 in your case.

As for the lens, the Canon 10-22 is absolutely gorgeous. Its the one thing I miss from my Canon days. The Sigma 10-20 is ok, the Canon is stonking.
 
justinminns said:
Rough prices are Sigma £350 Canon £600 so there is quite a difference, I'm sure the Canon is the better lens but I've had some good results from my Sigma so if the budget doesn't stretch to the Canon, the Sigma is a good option
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Sorry, I meant second-hand prices. If you don't mind second-hand then you can get the Canon for about £360 now. I got mine for £415 just over a year ago and that was at a good price! Haven't checked the prices of the Sigma lens recently but I think around £240 or something?
 
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Razor-BladE said:
Sorry, I meant second-hand prices. If you don't mind second-hand then you can get the Canon for about £360 now. I got mine for £415 just over a year ago and that was at a good price! Haven't checked the prices of the Sigma lens recently but I think around £240 or something?
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Second hand is definitely fine! Aside from my nifty fifty, all my kit is second hand.

I seem to have far too many expensive hobbies.....

:bang:
 
The tokina 11-16 is the best UWA on the market, and £200 cheaper than the canon 10-22.
 
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rjbell said:
The tokina 11-16 is the best UWA on the market, and £200 cheaper than the canon 10-22.
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I take it by that post you have used and owned both of these?
 
rjbell said:
No i just read plenty of reviews before buying anything.
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So how can you say its the best with out trying. Reviews on the internet and mags can vary in so many directions. The only way you can test is to go and try each lens and make your own mind up.
 
matt b said:
So how can you say its the best with out trying. Reviews on the internet and mags can vary in so many directions. The only way you can test is to go and try each lens and make your own mind up.
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This is a silly argument as you can never fully test without owning the both and testing the both fully, then this is just 2 copies. There are enough reviews out there to get a idea.

Before buying any lens you buy every model before deciding the best?
 
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rjbell said:
The tokina 11-16 is the best UWA on the market, and £200 cheaper than the canon 10-22.
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Except the Canon is better for flare, iq, range and AF...
 
rjbell said:
No i just read plenty of reviews before buying anything.
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...and most of the reviews also point to the Canon being the best UWA for a cropped Canon. The Tokina is good, but not as good as the Canon.
 
The best will not be cheap
See what you can afford and choose the best of those....

Need to keep real.....
 
Terrywoodenpic said:
The best will not be cheap
See what you can afford and choose the best of those....

Need to keep real.....
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Budget will be around the £200 mark, so any suggestions around that would be appreciated (base prices on second hand values!)

My other thought was just to get a EF 35mm F/2.0, but I'm not sure thats going to be wide enough, I'm guessing its not going to be much wider than I can get with my 18-55 kit lens?
 
@ Apretext

Set your 18-55 to 35mm and that will give you the same field of view as a 35mm F2 (albeit a lot faster lens). It is not near as wide,m on a crop camera it is getting closer to the old "50mm standard lens".

If you want wider than 18mm you will need <= 17mm on your camera, like a 10/12-22/24mm zoom or even a prime.
 
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Apretext said:
Budget will be around the £200 mark, so any suggestions around that would be appreciated (base prices on second hand values!)

My other thought was just to get a EF 35mm F/2.0, but I'm not sure thats going to be wide enough, I'm guessing its not going to be much wider than I can get with my 18-55 kit lens?
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Eh? Your kit lens at 18mm will massively wider than the 35mm f/2.
 
odd jim said:
Eh? Your kit lens at 18mm will massively wider than the 35mm f/2.
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Ok, maybe I'm getting confused here, but aren't wide angle lenses of a different construction than a normal lens? Or is it just that below a certain focal length that lenses are considered wide angle?

Or both!?

I was under the impression that the 35mm F/2.0 was a wide angle, or is it just that anything below 50mm is considered a wide angle?
 
Wide angle is a term that is used to describe a lens that gives a wide view, that is all. Nothing different in the construction. The shorter the focal length, the wider the field of view. Simple. Forget EF/EF-S that is the mount and has nothing to do with focal length at all. I think you must be confused, so forget about the letters and think about the numbers, lower=wider, higher=narrower. :-)
 
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rjbell said:
The tokina 11-16 is the best UWA on the market, and £200 cheaper than the canon 10-22.
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I've got the tokina 11-16 and its superb really Sharp
Not noticed any flare or other problems
The Canon is supposed to be better but its also more expensive
 
The jurys out on this as ive read plenty with tht tokina comes top.
 
Both the canon and tokina are fine lenses - looking at a picture between the two in doubt you would be able to tell the difference.

If i was going to get an UWA lens for a 40d I would get the canon 10-22 before the tokina. Focal range is bigger and has USM focusing.
 
15mm might be wide enough for you but most people like to be able to go a little wider on a crop camera. If your budget is tight look for a sigma 10-20 or tamron 10-24mm.
 
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Apretext said:
http://www.mpbphotographic.co.uk/us.../sigma-15-30mm-f/3.5-4.5-ex-dg,-canon-ef-fit/

Would this be any good? Obviously its not going to be anywhere near is as good as the Canon 10-22, but then its an awful lot cheaper! Its not going to be my main lens, so don't want to spend a fortune...
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Heres a review from Photozone...

http://www.photozone.de/Reviews/311-sigma-af-15-30mm-f35-45-ex-dg-lab-test-report--review?start=1

Looks pretty good on an 8 megapixel body, most cheaper ultrawides tend to suffer from weak boarders but one advanatge of a FF lens is your only using the center, 15mm on a D40 will be roughly a 24mm equivilent which while noticble wider than 17/18mm isnt really want I'd call ultrawide.

Filters maybe an issue, it doesnt have a built in filter thread but it uses a 2 part hood with the lower part having a filter thread. On FF this would obviously block some of the veiw at the widest setting but I spose you might be able to get away with it using a crop. Still it needs 82mm filters and there not cheap.
 
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