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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 20 Sep 2012 (Thursday) 20:21
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Lense options for full frame?

Senior Member
305 posts
Joined Apr 2010
Location: Vancouver, BC
Sep 20, 2012 20:21 |  #1

I have the T3i and have been waiting around for something new to come out that is actually worth the upgrade. The 6D looks like it is the answer, I am preparing to get this camera in January, after the December release. With my T3i I've been using the Sigma 17-70 f/2.8-4 OS lense, which was a perfect zoom range for me.

With a crop body I assume the 17mm would be extremely wide angle?
what is a lense that gives me similar zoom range on the crop body?

I'd preferably want a lense with a lower aperature like a set f/2.8.

Any suggestions?

I was thinking about Sigma 24-70 f/2.8
Canon lenses are a bit pricey for me at the moment to justify paying those prices.

Canon 24-105 f/4 seems nice but aperature is not low enough as I was hoping.

I also shoot video so a lower aperature is pretty important.
I had a Canon 17-85 f/4 before and the F/4 aperature was not that great in low light in night.

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32 posts
Joined Apr 2011
Sep 20, 2012 20:33 |  #2

I recommend primes, but that's my personal preference. I like bokeh, so for FF I would suggest a 50 1.4 to start, a 135 2.0 next, and then a 24 or 14, depending on how crazy you want to get with the wide angle. One of my favorite lenses is the 200 2.8 II, which is a steal and crazy sharp.

1,416 posts
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Joined Jul 2011
Location: Stanwood, WA
Sep 20, 2012 20:38 |  #3

The 28-135mm IS USM or the 24-105L are the closest zoom ranges to the 17-70mm equivilent. it's about 27-112mm on a FF body. 24mm is pretty freaking wide on FF and it is awesome. With modern bodies, 5D2 and up, the high ISO control is very good and if you are worried about f/4 being to slow, you shouldn't be. Especially because the lenses you'll be looking at will have IS. Unless you NEED f/2.8 for background blur or faster shutter to stop action, don't worry about it.

5D4 | 8-15L | 28-135mm f/3.5-5.6 IS | 24L II | 40mm pancake | 100L IS | 70-200mm f/2.8L IS mk2 | 400mm f/4 DO IS

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Joined Apr 2010
Location: New Zealand
Sep 20, 2012 20:44 |  #4

17mm is about 28mm on a FF body.

So the 24-105 is wider, and almost as long, and 'faster' by any real usable measure (on FF). (external link) - (external link) - (external link)
Gear: A7r, 6D, Irix 15mmf2.4 , canon 16-35f4L, Canon 24mm TS-E f3.5 mk2, Sigma 50mm art, 70-200f2.8L, 400L. Lee filters, iOptron IPano, Emotimo TB3, Markins, Feisol, Novoflex, Sirui. etc.

Cream of the Crop
10,251 posts
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Joined Aug 2007
Location: San Jose, California
Sep 20, 2012 21:11 |  #5

If you must have f2.8, then pick up one of the 24-70s. The new Canon Mark II is coming out, so you might find a good deal on a used 24-70/2.8L "Mark I", which is still a very good lens.

Keep in mind that you'll likely find at least one stop higher usable ISO with the 6D, compared to your T3i. (No one has hands on with 6D yet to speak of, but if it's at least as good as 5DII or III, you should expect a stop higher ISO will be usable... maybe more.) That might make up for an f4 lens.

An inexpensive lens choice that might make a useful walkaround lens would be the 28-135 IS. It sells for around $450 new, but you can find lightly used ones for around $250 pretty easily, so many have been sold in kit with 40D and 50D, in particular. It's much better than most "kit" lenses.

Of course, if shallow depth of field is your goal, there's no substitute for f2.8.

Frankly, I don't consider f2.8 all that big an aperture for low light shooting. For that I look to reasonably affordable primes such as 28/1.8, 50/1.4, 85/1.8 (all three of which can be bought for about the price of a new 24-70/2.8L "Mark I"). Primes aren't as convenient, though.

Alan Myers (external link) "Walk softly and carry a big lens."
5DII, 7DII(x2), 7D(x2) & other cameras. 10-22mm, Tokina 12-24/4, 20/2.8, TS 24/3.5L, 24-70/2.8L, 28/1.8, 28-135 IS (x2), TS 45/2.8, 50/1.4, Tamron 60/2.0, 70-200/4L IS, 70-200/2.8 IS, 85/1.8, Tamron 90/2.5 Macro, 100/2.8 USM, 100-400L II, 135/2L, 180/3.5L, 300/4L IS (x2), 300/2.8L IS, 500/4L IS, EF 1.4X II, EF 2X II. Flashes, studio strobes & various access. - FLICKR (external link) - ZENFOLIO (external link)

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Joined Oct 2007
Location: A Caribbean island in Belize and occasionally UK
Sep 20, 2012 21:22 |  #6

The 24-105L works deceptively well in low light.

5D & 7D (both gripped), 24-105L, 100-400L, 15-85, 50 f1.8, Tamron 28-75, Sigma 12-24, G10, EX-Z55 & U/W housing, A1+10 lenses, tripods, lighting gear, etc. etc.
"I prefer radio to television. The pictures are better"

2,062 posts
Joined Nov 2010
Sep 21, 2012 05:22 |  #7

The math is the same- just reverse it for full frame to crop. The 24-105 represents a 15-65 range. The 24-70 represents an even narrower range- 15-44 on a crop. The 24-105 works surprisingly well for a f/4 lens. The real problem is- if you need f/2.8 because of low light- you probably need to add light anyways- or go to a faster prime to make a real difference.

Out of curiousity- what are you shooting that makes you think the 6D is the worthwhile upgrade ? What are you shooting ? OK- personally, some of the specs on the 6D is both troubling and well, I think it blows.

EOS 5D III, EOS 7D,EOS Rebel T4i, Canon 70-200 f/2.8 IS II, Canon 24-105L, Canon 18-135 IS STM, 1.4x TC III, 2.0x TC III, Σ 50mm f/1.4, Σ 17-50 OS, Σ 70-200 OS, Σ 50-500 OS, Σ 1.4x TC, Σ 2.0x TC, 580EXII(3), Canon SX-40, Canon S100
Fond memories: Rebel T1i, Canon 18-55 IS, Canon 55-250 IS, 18-135 IS (Given to a good home)...

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Lense options for full frame?
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