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Search: Posts Made By: Tannin
Forum: Bird Taxonomy and Nomenclature Friday 1st May 2009, 17:11
Replies: 27
Views: 6,317
Posted By Tannin
Rasmus, I'd make three points here. First, I was...

Rasmus, I'd make three points here. First, I was not writing for clarity, not detail. So yes, the minutiae does become a bit more complex!

Secondly, I don't see how you can write that "numerous...
Forum: Bird Taxonomy and Nomenclature Friday 1st May 2009, 13:16
Replies: 27
Views: 6,317
Posted By Tannin
Richard, Pariah gave you a pretty good answer...

Richard, Pariah gave you a pretty good answer right away, but let's see if I can't boil it down to something short and simple.

H sapiens is generally considered to be monotypic because it is...
Forum: Canon Friday 1st May 2009, 00:43
Replies: 85
Views: 10,857
Posted By Tannin
Now you raise an interesting point, Thomas! I've...

Now you raise an interesting point, Thomas!

I've never owned a 350D (played with a friend's one a bit though) but I have owned a 400D, which by rights ought to be the same as the 40D (of which I...
Forum: Canon Tuesday 28th April 2009, 12:57
Replies: 85
Views: 10,857
Posted By Tannin
Compared to what? A 300D? Any image quality...

Compared to what? A 300D? Any image quality improvement the 40D provided over the 20D/30D was marginal. Not much difference in the AF system, inferior colour, not a lot in it for noise, but about...
Forum: Canon Saturday 11th April 2009, 08:13
Replies: 9
Views: 1,447
Posted By Tannin
Wow! That's a pretty steep price for an ancient...

Wow! That's a pretty steep price for an ancient camera. :( Maybe if you got it with some bells and whistles.

But no matter: the 20D is a superb camera, clearly the best camera on the market in its...
Forum: Canon Wednesday 8th April 2009, 23:59
Replies: 85
Views: 10,857
Posted By Tannin
This is a fundamental misunderstanding of the way...

This is a fundamental misunderstanding of the way diffraction applies to sensors. Diffraction has got nothing to do with sensors. It is purely and entirely a lens issue. 100%. The only difference is...
Forum: Canon Tuesday 31st March 2009, 15:51
Replies: 9
Views: 3,840
Posted By Tannin
Centre point is best for BIF. The focus assist...

Centre point is best for BIF. The focus assist points on the 1 Series are excellent, but the 50D doesn't have these. Try to keep the bird as centred as you can, and stop down a bit so that DOF will...
Forum: Canon Tuesday 31st March 2009, 15:00
Replies: 85
Views: 10,857
Posted By Tannin
Not remotely strange: the Canon entry-level new...

Not remotely strange: the Canon entry-level new models have always been pushed through pretty quickly, generally once a year. The 500D is a year newer than the 450D which was a year newer than the...
Forum: Canon Saturday 28th February 2009, 10:00
Replies: 18
Views: 2,843
Posted By Tannin
AF with a Canon 1.4 TC and a 100-400 on a 1D III...

AF with a Canon 1.4 TC and a 100-400 on a 1D III is centre point only and quite slow, but accurate and perfectly usable. It is noticably faster than using a 2X Canon converter on a 500/4. I tend to...
Forum: Canon Thursday 5th February 2009, 22:32
Replies: 14
Views: 3,032
Posted By Tannin
Auto-cleaning is absolutely worth having. It...

Auto-cleaning is absolutely worth having. It works, and works brilliantly.

I own or have owned 400D, two 40Ds, 50D and 1D III, and have never had to manually clean te sensor on any of them, while...
Forum: Sigma & Other Third Party Lenses Monday 19th January 2009, 08:07
Replies: 30
Views: 43,952
Posted By Tannin
Sorry Alan, but the description I gave above is...

Sorry Alan, but the description I gave above is quite correct (though lacking some detail). I'm afraid you have got completely the wrong end of the stick here.

The difference you are observing...
Forum: Sigma & Other Third Party Lenses Monday 19th January 2009, 02:05
Replies: 30
Views: 43,952
Posted By Tannin
Oh dear, ancient thread, but there doesn't seem...

Oh dear, ancient thread, but there doesn't seem to be a sensible answer to the magnification question, so we had better have one.

Max magnification is simply what happens when you combine focal...
Forum: Canon Sunday 11th January 2009, 22:37
Replies: 10
Views: 1,603
Posted By Tannin
I have the 500/4 (1D III) and the 100-400...

I have the 500/4 (1D III) and the 100-400 (50D).

The 100-400 is certainly useful sometimes, but not all that often. It's a very useful range of focal lengths, but is let down by (more than any other...
Forum: Canon Sunday 4th January 2009, 20:47
Replies: 22
Views: 2,778
Posted By Tannin
Don't use the converter. If you want to use a...

Don't use the converter. If you want to use a teleconverter, buy a lens that is designed for that task - any of the Canon f/4 or f/2.8 primes. But even with those, you still get the best results...
Forum: Canon Friday 19th December 2008, 04:56
Replies: 14
Views: 3,985
Posted By Tannin
It doesn't really matter what metering mode you...

It doesn't really matter what metering mode you use, so long as you pick one and stick to it. Get to know what to expect from that mode, and then you are in a position to accurately guess the correct...
Forum: Canon Tuesday 16th December 2008, 06:39
Replies: 26
Views: 3,043
Posted By Tannin
I second Adey's comments, apart from the "more...

I second Adey's comments, apart from the "more intense colours" part. At least so far as I can tell, that is a side-effect of the 40D tending to under-expose a little compared to the 20D.If you bring...
Forum: Canon Friday 12th December 2008, 10:54
Replies: 102
Views: 13,929
Posted By Tannin
Whooah there Roy! Yes, by all means compare...

Whooah there Roy!

Yes, by all means compare 100% crops between two different cameras with the same sensor size and the same pixel density. That is a perfectly reasonable thing to do. It probably...
Forum: Canon Thursday 11th December 2008, 10:15
Replies: 23
Views: 2,411
Posted By Tannin
You have to wonder if your retailer is shipping...

You have to wonder if your retailer is shipping you the lenses someone else rejected already. Two duff ones in a row - that is not what you expect with any Canon product, never mind their flagship...
Forum: Canon Wednesday 10th December 2008, 11:47
Replies: 23
Views: 7,531
Posted By Tannin
Spot on, Frank. I'll take that bet ...... but...

Spot on, Frank.



I'll take that bet ...... but only after we carefully define what we mean by "about".

With the same lens and same everything else - including the same cropping to show the same...
Forum: Canon Wednesday 10th December 2008, 11:36
Replies: 23
Views: 7,531
Posted By Tannin
Sorry Peter, I should have expressed that more...

Sorry Peter, I should have expressed that more clearly.

Take the same picture of the same bird with the same lens (poor little thing must be really wishing we would pull out those nails holding it...
Forum: Canon Wednesday 10th December 2008, 10:17
Replies: 23
Views: 7,531
Posted By Tannin
Very, very different things! You don't actually...

Very, very different things!

You don't actually gain all that much extra reach with a 500/4 as compared with a 400. A bit, yes, but nowhere near enough to justify the expense (huge) or the weight...
Forum: Canon Wednesday 10th December 2008, 09:59
Replies: 23
Views: 7,531
Posted By Tannin
Interesting experiences there, Roy. "Interesting"...

Interesting experiences there, Roy. "Interesting" because my experimentation with a very similar pair of cameras leads to a very different conclusion!

I had two 20Ds, which were pretty much...
Forum: Canon Wednesday 10th December 2008, 08:40
Replies: 23
Views: 7,531
Posted By Tannin
If you compare correctly - i.e., compare finished...

If you compare correctly - i.e., compare finished images - not true. 50D wins comfortably. If you do silly things like compare 100% crops, you may well get this result, but it's meaningless. You need...
Forum: Canon Wednesday 10th December 2008, 08:36
Replies: 23
Views: 7,531
Posted By Tannin
Hi Roy, Reach is the amount of detail you can...

Hi Roy,

Reach is the amount of detail you can resolve from a distant small object (such as a bird). The primary determinant of reach is pixel density. (Assuming, of course, that we hold other...
Forum: Canon Tuesday 9th December 2008, 20:29
Replies: 23
Views: 7,531
Posted By Tannin
No argument with the Roy and John about the...

No argument with the Roy and John about the merits of the Mark III, if you incline towards the action side of bird photography, it's the best there is. But that's not your style, Peter, and with a 1D...
Showing results 1 to 25 of 1000
 


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