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Messages - epsiloneri

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286
Lenses / Re: 24-70 mm f/2.8
« on: December 12, 2010, 08:17:01 PM »
I know this is also probably not what you want to hear, but I don't think either is a very good match for your 7D. It of course depends on what you are looking for in a new lens, but if it is light gathering power, I would suggest the EF-S 17-55/2.8 IS instead. Both lighter and cheaper than the EF 24-70/2.8L, but just as good, if not better, IQ. Also a more useful focal range, IMHO. 24mm is not really wide enough on APS-C (try it on your current lens). No weather sealing though, if that's a big deal for you.

287
I don't know how the EF-S 10-22mm compares to the EF 16-35L on APS-C in the focal range where they overlap, but overall, the 10-22mm is very well regarded and I don't think you would disappointed by it. There are plenty of professional online reviews you can consult if you're uncertain.

If you're anyway planning to stay with APS-C for some time, I think it's a bad idea to insist on FF lenses and not take advantage of the EF-S format at the wide end (lighter, cheaper). My advice is to sell your EF-S lenses when/if you make the APS-C to FF switch. You will not lose that much money, and the money will be well spent. There is no current Canon FF lens on the APS-C able to compete with the EF-S 10-22mm at the wide end.

288
EOS Bodies / Re: Canon EOS 7D Mark II - sensor
« on: December 04, 2010, 03:12:50 AM »
Quote
if I wanted to shrink my 300 F4's length, I'd shoot it on my film rebel.

Ha! Ha! I think we are all getting spoiled by the extra reach of the 1.6 crop. I'm certainly not interested in going backward either.

I don't get this. The way things are going, in the future the price of a camera will be set by its optics, not its sensor. If you're anyway using a FF lens, why not let the sensor cover the whole available field? Your "crop" camera will be equivalent to cropping the image of the FF (hence the name "crop" camera). Is it the larger magnification of the view finder on crop cameras you will miss? Concern about many pixels taking space while going unused? Perhaps Canon could do like Nikon and have an "APS-C" mode with in-camera cropping.

Edit: Here's and idea. What would you think of a 3.2x crop camera then? You'd have twice the reach compared  to 1.6x!

289
EOS Bodies / Re: Changes to dials on Canon 5D and 7D
« on: December 01, 2010, 06:34:09 PM »
I think it's a nice addition; it happens to me from time to time that the dial moves accidentally, resulting in a lost shot. I wouldn't spend $100 on it, however. For some professionals it could perhaps be worth it.

290
Lenses / Re: 24 - 70 f/2.8 L : When Is The New Version Expected?
« on: November 29, 2010, 12:25:25 PM »
I also tested both 17-55 2.8 IS and the 24-70 2.8 on my 50D. 3 people looked at the photos and the 17-55 produced a ted better photos. So until Canon does not come with a better lens for FF I will not switch to FF

But how do you know the 24-70/2.8 does not produce better photos on a FF than the 17-55/2.8 on the 50D?

291
Lenses / Re: 24-840mm zoom
« on: November 23, 2010, 03:01:03 AM »
I want a Canon 10-5000mm F1.2 L IS USM

In principle, you could build such a lens. Unfortunately it would have to be >4m in diameter.

The longest lens I've used was a 123000mm f/15 IS prime :P It wasn't either very portable, though (and didn't have an EF mount). The longest lens I've connected to an EF camera was an 11000mm f/11 prime. Biggest IQ limitation was the atmosphere. I probably don't have to add that those lenses dwarf even an EOS 1Ds mkIII.

292
Lenses / Re: 24 - 70 f/2.8 L : When Is The New Version Expected?
« on: November 22, 2010, 01:16:44 PM »
The most recent posts are:

http://www.canonrumors.com/2010/10/canon-ef-24-70-f2-8l-ii-patent/
http://www.canonrumors.com/2010/10/lenses-in-2011-cr2/
http://www.canonrumors.com/2010/09/ef-24-70-f2-8l-replacement-cr2/

Standard expected announcement time has been in about "half a year from now" for the past year(s). Expected price in the UK £1400 based on sheer speculation combined with comparison on mark-ups for non-IS to IS versions of other lenses. Could be quite wrong, but should be within £1k-2k with high confidence.

293
Lenses / Re: 100-400 Replacement
« on: November 22, 2010, 12:52:54 PM »
The only time that I've been in a rain forest, I can't recall having had need of a lens faster than 5.6.

Rain forests are often surprisingly dark, even at noon. Light conditions can also be difficult due to tree crown openings that let through spots of harsh sunlight, resulting in very contrasty conditions. Flash can actually be a good option, unless you're hunting easily disturbed animals.

294
Lenses / Re: EF 24-105 f/3.5-5.6 IS Patent
« on: November 22, 2010, 12:34:40 PM »
I wonder why it's not called 25-102mm, or even 25-100mm, since that seems to be the focal length range (for focus at infinity, I assume).

"Pojitiburidotaipu zoom" should be "Positive ride type zoom".

Ah yes, I wondered about that too. Not that "positive ride type zoom" is much more illuminating (to me).


295
EOS Bodies / Re: March, Lenses & Stuff
« on: November 20, 2010, 02:06:16 PM »
Thanks Kyle, for the nerdy summary of dSLR lifetimes. Posts like yours are a zillion times more interesting than the "why I prefer Canon/Nikon over Nikon/Canon" posts.

296
EOS Bodies / Re: No 1Ds IV? [CR1]
« on: November 10, 2010, 02:59:08 PM »
A long lens actually need a bigger mirror due to the narrower object angle. You can try to  draw it out yourself. or you can try to read some of the manual of film SLR in the 60's, they do mention the above effect.

Hmmm.... I'm not convinced. Wouldn't you get limb darkening unless the mirror reflected the full beam? Unfortunately I don't have any camera manuals from the 60's lying around  :) Perhaps you can direct me to a more accessible source for information?

297
Of course, Pros have a way to recover their equipment cost, whereas the amateurs, don't. What could be used as a business write-off for Pros, amateurs don't. Even more, since Pros can get their equipments' cost from jobs, amateurs don't.

I agree, but the point was that the equipment often are more than tools for the amateur. If the impact of scratches or dust is insignificant for its function, it is of no consequence for a pro; but for an amateur, they can be a major issue.

298
EOS Bodies / Re: No 1Ds IV? [CR1]
« on: November 10, 2010, 02:20:22 AM »
say Canon makes 500$ profit on every 1DsMk IV body and just 200$ profit ona each 5d Mk III.

Now, number of 5d MkIII buyers = 50x(1DsMk IV buyers).

So effectively canon makes 10000$ profit for every 500$ profit it makes on 1Ds Mk IV.
So it is logical for Canon to listen to a 5dMKIII demand.

But what if Canon makes a $3000 profit on each sold 1DsMk IV body and only $30 on each 5d Mk III? How do you know?

299
EOS Bodies / Re: No 1Ds IV? [CR1]
« on: November 10, 2010, 02:15:08 AM »
A Pelical mirror set up may work, at least for shorter focal length. For super-telephoto, It will lost some view at the top.
Why would a pelical mirror need to be smaller, and why would the focal length matter?

300
EOS Bodies / Re: No 1Ds IV? [CR1]
« on: November 09, 2010, 05:19:15 PM »
Is there any chance that Canon is thinking about a square sensor that is 31.5mm on each side? This format will use ALL the existing EF lens and take the bulk out of the medium format. Just like the  Rollieflex 127 in the OLD film days.

This topic has been covered before, and the conclusion was that it doesn't work for an EF dSLR because there is insufficient room for a mirror (to cover that field) between the lens and the detector. Canon would have to go EVIL to make an EF camera with a square super-FF detector. Then there is the issues with possible internal baffles on lenses (and the minor issue with tulip-shaped hoods).

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