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Messages - AJ

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376
EOS Bodies / Re: 1Ds4 & 5D3 Timetable [CR1]
« on: March 14, 2011, 10:52:16 AM »
... FF cameras produce better images/video and have more/better glass options.

Actually you have more lens options with crop because crop cameras fit both EF and EF-S. 

As for better images, it depends how large you print.  My largest prints are 13"x19" and crop works well for that.

377
EOS Bodies / Re: 1Ds4 & 5D3 Timetable [CR1]
« on: March 12, 2011, 01:13:43 PM »
The EF-S line of lenses are not high on the list of priorities at Canon.
“L” lenses and the development of them are whats needed to get the most out of the 18mp crop sensors.


Hehehe...  Sounds like a line from a full-frame enthusiast and L-snob  Someone who obviously doesn't understand business.  Canon makes good money on their crop gear.  Furthermore, if you want to get the most out of your 18 mpix crop sensor then EF-S lenses like 17-55 and 15-85 are the way to go.  Why struggle with full-frame ultrawides thast have limited focal length range and/or aperture.

This is CR -10, folks.

378
EOS Bodies / Re: 1Ds Replacement Soon?
« on: March 10, 2011, 07:05:05 PM »
i'm not entirely sure if there's any strategic value in releasing the 1ds4 before the 5d3.

Anyone in the market who would drop 10k on a camera would most likely wait the extra month or two to see what the 5d3 offers.

Em, no.

If a pro needs a camera, he or she will buy it now.  They are not technology-speculating geeks.

A pro will buy the camera for its build, dual card slots, etc.  Stuff that the 5D series doesn't offer.  5D = consumer, 1Ds = pro.  Completely different markets.

379
Lenses / Re: Lens Recommendation for Weddings.
« on: March 10, 2011, 04:57:18 PM »
Use your 7D.  Buy a Canon 17-55/2.8 IS and an 85/1.8 or 100/2.  These are sharp wide open, focus without hesitation, and focus with great accuracy.  This is all you really need.  I know, because I own the set and I've worked assisting a wedding pro.

Be sure to have backup: another body, standard zoom (maybe the 18-135 that you hate) and a second hotshoe flash.


380
Lenses / Re: Canon 16-35 2.8L II ir Tokina 16-28 2.8 FXPRO or What
« on: March 10, 2011, 04:44:05 PM »
How about Canon 15-85/3.5-5.6 IS

381
Lenses / Re: Sigma 8-16 or Canon 10-22
« on: March 10, 2011, 04:41:44 PM »
thx the comparison.

Only one thing. I have read several articles about the Sigma 8-16 and some links mentioned that there are "big" differences between Sigma 8-16 due to manufacturing tolerances or quality check.
Is it serious (or basic Sigma issues)?

True, but be aware that Canon isn't immune to decentering and other defects.  Buy local and exercise your warranty if you get a lousy lens.

382
Lenses / Re: Which +/- 30mm lens to buy?
« on: March 10, 2011, 04:39:00 PM »
Canon 17-55/2.8 IS.  It's stabilized, which helps a lot with video.  I've used this lens for indoor video shooting and it works great.  f/2.8 helps in low light yet has forgiving dof.

383
Lenses / Re: EF-S 15-60 f/2.8 IS [CR1]
« on: February 18, 2011, 11:16:39 PM »
Since making lenses for smaller sensors is supposed to be 1. cheaper and 2. easier than making lenses for large sensors

Actually it's the other way around.  Making lenses for large format cameras is easier.  Case in point: lenses for large view cameras.  If you've ever looked at an Ansel Adam print, you're bound to be amazed at the resolution and detail.  Yet the lenses he shot with are primitive compared to today's SLR lenses.

384
Lenses / Re: EF-S 15-60 f/2.8 IS [CR1]
« on: February 17, 2011, 01:43:33 PM »
Given Canon's obsession for pixel count over sensitivity, the potential stop gained by f/2.8 compared to f/4 zooms would seem to be countered by the extra ISO step needed for the same noise level compared to a FF unit.

Exactly.  Few people get this - especially those who make statements like, "I'm not upgrading to FF until they make a FF equivalent of the 17-55mm f/2.8 IS," in reference to the magical unicorn also known as a 24-70mm f/2.8L IS.  In fact, the 24-105mm f/4L IS when used on FF specs out better than the 17-55mm f/2.8 IS on a crop body.  The FF-equivalent of the latter is 27-88mm f/4.5 IS, meaning the 24-105mm is wider, longer, and faster.  It's true that f/2.8 still yields a faster shutter speed than f/4, since the crop factor doesn't affect exposure (apparent effect is on DoF only), but as you point out - FF has a 1.3-stop advantage in ISO noise, meaning you can bump the shutter speed up a stop by using a higher ISO on FF to match the shutter speed you'd get with f/2.8 on a crop body.

Correct.

But here's another way to look at this.  Suppose we want to emulate 17-55/2.8 IS on a FF body.  We'll need a 27-88/4.5 IS lens to emulate field-of-view and dof, and we'll crank up the iso by one stop to emulate shutter speed.

So: the 17-55/2.8 IS can do almost the same as a 24-105/4 IS on full-frame.  Not quite the same focal length range, just a tad shallower dof, and even with iso up one stop there's still a slight noise advantage.  But it's close.

And that's pretty impressive if you think about it, for a sensor that's 2.5x smaller.

385
Lenses / Re: EF-S 15-60 f/2.8 IS [CR1]
« on: February 14, 2011, 11:35:42 AM »
One thing about the current 17-55/2.8 IS is that it's not particularly wide.  Although I haven't measured the field-of-view, it feels more like an 18-55.  My Tamron 17-50/2.8 goes noticeably wider.

I wonder if a new 15-50 would have a true 28 mm equivalent.  I have my doubts about 24 mm

386
Lenses / Re: Your lenses wishlist for 2011.
« on: February 08, 2011, 11:57:00 PM »
EF-S 50-135/2.8 IS ring-USM


If it's an equivalent build and optical quality to the 17-55/2.8, and a retail price of under $1800, it would sell like crazy.


I just realized I've been desensitized by recent "L" pricing.  $1400 would be much more appropriate pricing.

Looks like Sigma is first out of the gate
http://www.sigma-photo.co.jp/english/news/110208_apo50-150_28ex_dc_os_hsm.htm

387
Lenses / Re: Canon EF 200-400 f/4L IS Announced
« on: February 07, 2011, 01:04:57 AM »
... drool ...

388
Lenses / Re: Your lenses wishlist for 2011.
« on: February 06, 2011, 04:02:10 PM »
EF-S 30/1.8 for $100.  Even tinier than 50/1.8

EF-S 50-135/2.8 IS ring-USM

EF-S 50-135/2 IS USM (crop version of 70-200/2.8 IS.  Pipe dream, I know  :( )

389
Lenses / Re: Canon 400 f/5.6L IS in April? [CR1]
« on: February 06, 2011, 03:35:32 PM »
Well, I think this is one of lens with the highest Cost/performance value among Canon's lineup. While it lacks the flexibility of the 100-400 and the IS, in exchange you get the advantages of prime over zooms - faster focus and sharper images.
Yes indeed, the prime is sharper.  Also bokeh is far, far better with the prime.  Plus it has that color/contrast thing you only get from a prime.

390
EOS Bodies / Re: 600D/T3i Specs [CR2]
« on: February 04, 2011, 12:24:27 PM »
it's a rebel with a very clear cause; the same cause that all other rebels have -- to go out and sell like hotcakes and make canon very profitable.
Absolutely!

Here's another cause: it'll make the T2i come down in price.

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