About T3I EF lenses

I just want to know if my calculations are correct on this point. This is the focal point of equavalent of some privileged lenses EF on the T3i. I multiply by 1.6 x culture right?

24mm EF would be 38mm
30mm EF would be 48 mm
85mm EF would be 136mm

Is that correct or should I go?

Kolourl3lind wrote:

I was wrong. BY EOS, I meant ARE full frame camera and not Cameras EOS Rebel EF-S.

Also, pass my T3I and 6 d very often when I photograph an event. Photographed it hard when I don't have the same point of view using the same lens wiith each camera.  What I'm trying to do is buy a first decent Wideangle to fit on the T3i. This will allow me use the T3i just for wide angle of shooting at a focal distance and get photos decent quaility compared to 6 J using a zoom lens.

It's the best configuration, I can think that it's just easier for us my 6 d lenses and switch instead to carry two cameras.

Well, now it is more clear what you are doing, and you go back between the two formats.

However, he has very little of primes that are ultra wide on a full frame and still very broad camera on a culture's APS - C sensor. 24mm is a good wide angle on a full frame camera, but only behaves like a slightly large 'normal' when used on a crop sensor camera. I have and use a Canon EF 20 mm... fairly wide on full frame. It's nice, but only a moderately wide lens (32mm FF equivalent) on a sharecropper.

There are Canon 14 mm (origin and Mark II). And there is a manual focus only Zeiss 15 mm ZE. There are also a few glasses of 17mm. These are quite expensive, however. And, in a culture a 17mm camera sensor is only moderately wide.

In the past the Tamron and Sigma made 14mm full frame compatible lenses. Those who were of an image quality questionable and abandoned several years ago... so will be available used, if you can find them.

There is also a 14mm Samyang/Rokinon lens which is full frame compatible and affordable, but the update manual and operation manual only, so more time to work with. It sells for a little over $ 300 and also lie in Bower, dotted, ProOptic, Vivitar and other brand names (Vivitar called 13mm, even if it's the same lens.) This lens has strong "mustache" distortion, but there is software that can correct.

Another possible consideration, all 14, 15mm and many the 17 mm... and some of the largest of the full frame capable ultra wide angle zoom, too... tend to have front lens elements very strongly convex which allow not the standard to mount vissants filters.

There are simply not many really wide Prime lenses for crop sensor cameras. And most of the primes and zooms that are wide on FF, are only slightly or moderately wide on culture.

If you want to use the lens wide angle on the T3i onlycrop sensor, there are a few good zooms you should really consider.

Canon recently introduced an EF-S 10-18mm IS STM lens which is a real bargain priced at $300 and even less for sale currently. I have not yet used, but have heard a lot of good reports. No, is not as sharp edge on board as others, but it is quite surprisingly good for the price (which is at least $100 less than any other ultra wide-angle zoom... $200 or more at most).

Canon EF-S 10-22mm USM has been around for a few years, sells for about $650, and in my opinion is one of the best ultrawides to cultures of any manufacturer photo sensor. It is very well fixed, strong side by side with well controlled chromatic aberration, reasonably good quality of construction, able to use the standard 77mm filter and has exceptionally good flare control.

Sigma offers two versions of 10-20mm and the widest of all in a 8-16 mm. A 10-24 mm Tamron. Tokina has offered the fastest in a 11-16/2.8, but also a 12-24/4, (which are now discontinued, but can still be found). Tokina is currently introducing new models of 11 - 20/2.8 and 12-28/4.

However, all of the above zooms are 'just culture' (at least on a technical level, see below).

If you want to use the lens on your T3i and 6 d...

Canon of nine 11-24 2.8 L / would work fine... but is very expensive (almost $3000).

Sigma offers a 12-24mm, which is full frame and crop sensor compatible. It is rather expensive and has one important of distortion.

There are various 16-28mm, 16-35mm, 17-35mm, 17-40mm which are full-frame compatible... tho, all this is just moderately wide on the T3i culture.

An interesting possiblitity... I can tell you for certain that a Tokina 12-24/4 is a good lens on cameras of the harvest, and that it is partially usable on full frame. I tested it as wide as 17 or 18 mm on my 5DII, until it begins to show the vignetting. I understand the Tokina 11-16/2.8 is usable on FF, too... but only she is put in 16mm. (I haven't used so can't say on the two new models of Tokina.)

FOR INFO:

Colloquial for Canon EOS Digital cameras is "APS - C / 1.6 X crop" and "full frame / 1.0 X.

Or just 'crop sensor', 'culture' or 'cropper' vs 'full frame' or 'FF '.

Canon lenses are ' EF/full frame compatible' or 'EF-S/APS-C only of cultures '.  Only Canon's EF-S objectives using a variation on the EF mount, designed to not allow lenses to physically join the cameras 'incompatible '.

There is no "ES" or even "EF" cameras and few people to refers to «Caméras EF - S» That's because the cameras APS - C or crop can use both EF and EF-S objectives... While the cameras full frame can only objective EF of use. Objective EF - S will rise not yet physically on the camera models full frame as your 6 d (nor on the third cannon used to provide format: APS - H or 1.3 X.hich also EF lenses require).

Home objective third-party manufacturers there are not EF-S-objectives. Sigma, Tokina and Tamron all only use EF mount, regardless. Although they may be possible to mount on a camera full frame, many glasses they offer always are "cultures only"... They do not produce an image circle large enough to cover the entire surface of a full frame sensor, it will strongly vignette. Yet some work partially (as indicated above).

Canon EF, "Di" of Tamron, Tokina "FX" and "DG" lenses Sigma are all sensor full frame and compatible cultures.

Canon EF-S, 'Di II' Tamron and Tokina "DX" Sigma "DC" lenses are all cultures only.

I hope this helps!

***********

Alan Myers
San Jose, California, USA.
«Market softly and carry a great lens.»
MATERIAL: 5DII, 7D(x2), 50D(x3), some other cameras, various lenses & accessories
FLICKR & EXPOSUREMANAGER

Tags: Canon Camera

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