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Messages - AlanF

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481
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 19, 2013, 04:26:22 PM »
The moon shots were posted just as universal images for comparisons. I am interested in extra range for nature shots. 

482
Lenses / Re: Need daily lens suggestion
« on: August 19, 2013, 04:21:18 PM »
The 15-85 is very sharp and gives extra range either side of the 17-55.  It's one of the best and most useful APS-C lenses made. 

483
Lenses / Re: Any chance Canon will incorporate 1.4x into Great Whites?
« on: August 18, 2013, 06:27:31 PM »
Incorporating an extender into those lenses would be great, as the optics are matched to the particular lens (that is how the 200-400 is). However, every big white is pretty new, including the 800, so maybe for the next refresh? It would be cool if they built in a 1.4, and then gave you a 1.6 external extender that is also optically matched to the lens so if you still need the 2x, then you would add that extra .6 the traditional way. It would probably add $1,000-1,200 to the price of the lens, but it would be a great innovation in my opinion.

The standard 1.4xTC would give you a final 2x.  It would be even better if they built in 2 1.4x TCs. Perhaps Sigma could get into the act with a 400-560-800 f/4-f/5.6-f/8. But, they already have a 300-800 zoom that looks pretty good.

484
Canon General / Re: Canon Binoculars
« on: August 18, 2013, 05:23:30 PM »
The Canon 15x50 weigh 41.6 oz plus wt of batteries,  and the Swarovski 10x42 29.6 oz and cost considerably more.  Twitchers don't count pennies when they buy their gear. 

I use neither but use my Canon camera as a monocular. The 600mm (300mm + 2xTC) lens on the 5D is roughly 10 x magnification and you can take a photo and enlarge on the screen to give telescope-like magnification when twitching. 


485
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 18, 2013, 04:04:39 PM »
Very nice. What lens were you using? The Kenko extension tubes allow autofocus, so I would get them over the cheaper ones. Also note they are only in a kit for $199 with a 12mm, a 20mm and a 36mm tube. The Canon 12mm is sold alone for $84. The product description does not state it, but I am sure theirs is compatible with the AF as well.

f/2.8 300mm II + 2xTC III. I will go for the Canon because I presume it is strong enough to marry a monster lens to a heavy body without snapping in two.

486
Canon General / Re: Canon Binoculars
« on: August 18, 2013, 04:01:36 PM »
The Canon IS are not very popular. Serious birdies tend to go for Swarovski...

How do the birdies hold them?  With their wings?   ;)

Or is birdies : lift :: birders : elevator?   On this side of the pond, a birdie is what little kids call a bird, or one under par on the golf course...

Seriously, I wonder why the Canon IS binocs aren't more popular.  Audubon Society shops here often don't even carry them.

The authentic English term for a bird watcher is a twitcher, but that would stretch your vocabulary too far. Who in their right mind would want to hold a heavy pair of binoculars all day that require their batteries changing every few hours? Importantly, field of view is important, and the high magnification of the Canons is against this. If you want really high magnification, and the Canon IS is betwixt and between, you need a scope with tripod.

487
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 18, 2013, 02:17:38 PM »
Impressive, I'll buy a 12mm ring. Here is a photo I took last April using the 5DIII + 2xTC. I've increased the pixwl dimension by 1.4x1.6 to allow for the crop factor and the TC used by you. I haven't sharpened or noise reduced the image.

488
Canon General / Re: Canon Binoculars
« on: August 18, 2013, 02:04:54 PM »
The Canon IS are not very popular. Serious birdies tend to go for Swarovski, the most popular, then Leica. I tested loads of pairs and found that the Hawke Frontier ED 8x43 performed as well as the Swarovski at about 20% of the price. Quite remarkable for a company whose other products were not noteworthy - they got it right for  this model.

489
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 18, 2013, 03:07:51 AM »
Thanks for the moon shot, the combination of lenses is just what I am interested in.  Did you manually focus? It would be interesting to see 100% crops with and without the 1.4xTC.

490
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 17, 2013, 02:05:51 AM »
You are, of course, correct that a quality longer lens gives better resolution than a quality shorter one, all things being equal.  What we want to know is whether stacking TCs on to a particular lens does lower its IQ to such an extent that it negates the gain in focal length. The series II telephotos and series III TCs are beautifully designed to work well together.  In my experience that is so but adding a 1.4 to a 100-400 is no better than using PS to increase size  by 1.4x.  What I particularly want to know is the IQ effect on stacking two series III together. Why did Canon stop us doing that? Was it intentional or what? My 5D III froze when I stacked a Kenko 1.4 TC onto a 2xTC III and a 300mm f/2.8 II.

491
Animal Kingdom / Re: Show your Bird Portraits
« on: August 16, 2013, 03:17:18 PM »
5DIII + 300mm f/2.8 II + 2xTC III @f/5.6 1/320 iso 1250, hand held. It's difficult to get detailed images of kingfisher's plumage, but the 2xTC III performed well.

492
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 16, 2013, 07:23:40 AM »
No need to do the experiment. I took out both my 5DIII and 7D yesterday to test in the wild in a nature reserve. I had forgotten how slowly the 7D focusses with the 300mm f/2.8 II with the 2xTC attached. Whereas the 7D is fine with the native lens, it is painfully slow with the 2xTC III attached. So, I might get a cheaper 12mm ring for the fun of it ot see what it does.

493
EOS Bodies - For Stills / Re: Canon 2x and 1.4x mk3 extenders
« on: August 15, 2013, 07:17:01 AM »
A Canon 12mm tube isn't cheap and I don't know how reliable the el cheapo ones are so I don't want to do an experiment myself.

So what do you think would give the better image:

A good f/2.8 lens with a 2xTC at f/5.6 on a 7d (e.g. the f/2.8 300mm II + the 2xTC III)?
Or the same lens plus 1.4x and 2xTC at f/8 on a 5D III?

Both have a similar reach.

494
Animal Kingdom / Re: Show your Bird Portraits
« on: August 15, 2013, 04:14:10 AM »
Here's something you don't see every day.

Burrowing owl.   These little birds are the only owls that dig burrows.  They're also diurnal unlike most of their relatives.

Here is another pair, one taken in daylight and the other in near darkness. They are difficult to get sharp images from as the feathers are so downy. Both are 100% crops taken on a 7D with a 100-400mm L in the Pantanal in Brazil, a bird lover's paradise.

495
Animal Kingdom / Re: Show your Bird Portraits
« on: August 14, 2013, 09:29:19 PM »
Some of us like to spend most of our time with a tripod, others hand holding, and others in between. So let's get on with it and each do our own thing, especially we amateurs who just want to enjoy ourselves and not make a living from our photos.

We shouldn't turn this thread into the usual rhetoric so here is another hand held shot from last weekend.

Sedge warbler @ 600mm

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