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Messages - jthomson

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Lenses / Re: Best telephoto clarity for the money
« on: August 22, 2013, 05:21:24 PM »
If you can get a high enough shutter speed with the 400/5.6, that's sharper than the 300/4.  Both are very slightly sharper than the 100-400, but there is copy variation to consider, so you may find some 100-400s that best the 400/5.6.  The 70-300L is sharper than all three.

The superteles are on a different class, for IQ and cost. My 600/4L IS II delivers substantially better IQ than my 100-400L, my 70-300L, or the 300/4L IS that I used to own.

+1  My 500mm f4L II has much better IQ than my 400mm f5.6L.   The 400mm f5.6L does play well with the 1.4x III on the 5D3   and with the Kenko DGX 300 1.4x on a Rebel.  The 100-400mm and extenders are much more hit and miss. 

Lenses / Re: Chances of EF-S 17-55/10-22 replacements w/ 7dmk2?
« on: August 22, 2013, 05:10:53 PM »

It WOULD be nice to start seeing better kit lenses.  I've always thought that the 15-85 would have made a great kit lens for the 60D/7D.  Yes, the kits would be more expensive, but as the lens would be higher production numbers, the prices would eventually come down.

15-85mm is sold in a kit with the 7D.  I got my 15-85mm as a white box  from someones kit.

Animal Kingdom / Re: Mystery Bird
« on: August 20, 2013, 02:55:20 PM »
+1 for Green Heron

Animal Kingdom / Re: Show your Bird Portraits
« on: August 20, 2013, 02:53:54 PM »
Ah, since we're on the topic here's one I shot in April I thought was a lesser yellowlegs but I'm being told it's not.  Any idea?

It's a fair sized bird maybe about the size of a Canadian robin.


I'd go with solitary sandpiper as well.

Lenses / Re: Telephoto for 6D?
« on: August 18, 2013, 07:56:13 AM »
You should take a look at the Tamron 300mm USD VC.  It is in your price range.

Animal Kingdom / Re: Show your Bird Portraits
« on: August 18, 2013, 07:50:49 AM »
A couple from the last few days

don't have your specific equipment, but  I've used a kenko 300 dgx 1.4x converter on a 5D3 with  my 400mm f5.6L with no problems.  Before and after the firmware upgrade.

I am a little confused.  The Digital Picture review claims that this new S version shows a significant improvement in sharpness, and has the comparative test results to back this up.  Yet the MTF charts and optical design for this lens and the previous version are  identical.  Also, Roger over at LensRentals (who I have a great deal of faith in) says: "the optics are identical" and consequently he wouldn't pay the extra grand for the new version.

What do you think is going on here?

Explained in article.

 Roger, after tearing down both OS versions of the 120-300, said it appeared that elements in these lenses could be interchanged. The optical design seems unchanged. When questioned about this, Sigma replied that the 120-300 "S" has 2 FLD Glass elements instead of one. FLD glass has performance equal to fluorite, which is excellent.

So 2 FLD elements instead of one so better IQ.

Lenses / Re: Cheap telephoto lens
« on: July 17, 2013, 04:36:29 PM »
Which one to choose? The cheaper Tamron or the Canon with the better optics?

Actually the Tamron  is cheaper and has better  optics than the Canon 70-300mm.
 See the Photozone  review.
Its a no brainer get the Tamron 70-300mm USD VC.

Lenses / Re: Dxo tests canon/nikon/sony 500mm's
« on: July 15, 2013, 11:17:55 AM »

The most important factor in their BS Score is transmission, which is why the cheap 50/1.8 lenses from both Canon and Nikon score several points higher than any of these 500/4 lenses. It's only when you have lenses of identical max aperture that the other stuff has any influence.  BTW, while the 500/4s score 25, the Canon 50/1.8 on a 5DIII gets 28, and the Nikon 50/1.8 on a D800 gets a 31, and main measurement difference between the 50/1.8s is that the Nikon is 1 P-Mpix sharper (put it on the D3X, it's sharpness and Score tie the Canon). So, the Nikon 50/1.8 is 1 P-Mpix sharper and gets a Score 3 points higher, the Canon 500/4 is 3 P-Mpix sharper, but the Scores are equal.


I begin to wonder if the 'secret metric' you mention is sponsorship...   :o

If transmission really was the most important factor then the Sony should  be out scoring the Nikon.  The Sony equals or beats the Nikon in all the listed categories and has  the lowest transmission of the three lenses.

Basically I think DxO are a bunch of Nikon fanboys.  The individual ratings are fine, but the composite scores ae just ridiculous.

Software & Accessories / Re: Lightroom vs. DPP
« on: July 05, 2013, 11:04:02 AM »
I've been using DPP for years.  Decided to try out LR.  Didn't like it.  Even opening the RAW file showed me huge differences immediately (shot in "faithful" with sharpening at 0 from the camera).  Add to that the complexity of using LR and I quickly went back to DPP.

That's because DPP applies "faithful" when you import.  By default LR applies Adobe Standard.  You need to set up an import preset in Lightroom to apply the camera calibration "faithful" on import. 
I expect that this is also what the OP was seeing when he talks about the original RAW's .

Third Party Manufacturers / Re: Canon 300 2.8 IS II with Gimbal Head
« on: June 27, 2013, 10:32:18 AM »
naturescapes has a replacement foot that allows you to adjust  how much of the plate sticks forward and backward.

Lenses / Re: The ULTIMATE Canon lens
« on: June 25, 2013, 11:26:15 AM »
The Canon-made “Wide Field Corrector,” as it’s called, is placed in front of the giant sensor in order to improve the image quality of the main telescope lens.

So it is really just the worlds largest extender. ;)

« on: June 19, 2013, 12:35:27 PM »
Here are some general guidelines about who owns copyright on photographs and illustrations in the absence of written agreements to the contrary. When photographers/illustrators create photos, portraits or engravings (in the case of illustrators, portraits only):
 ◦When creators produce a work for themselves, they own the copyright.
 ◦When creators produce a work as part of their employment, including apprenticeships, the employer owns the copyright.
 ◦When created on a commissioned basis, the person or company that commissions the work owns the copyright once they have paid for it in full. If the client who commissions the work fails to pay for it, the copyright remains with the creator.

This is based on canadian copyright law.  The company is correct, they own the rights to what they commissioned unless  you have a contract that explicitly states that the photographer retains the rights.
You should look at gettng some standard contract documents  that allow  you to retain your rights. 

Just googled some more and apparently this was changed late last year.

General Copyright information: Photographs
At Last, Canadian Photographers Own Their Copyright.
The Professional Photographers of Canada (PPOC) and the Canadian Association of Professional Image Creators (CAPIC) would like to congratulate all photographers in Canada on this important date and pivotal achievement in the photographic industry. As of Nov 7, 2012, Canadian photographers officially own the copyright to all of their work whether the photograph is commissioned or not, thanks to the new Copyright law.

3rd party grip and batteries. Genuine Canon products are way over priced.
I've never had a problem with the 3rd party batteries and grip on the T1i for the last three years. Have had 3rd party grip and batteries on the 5D3 for about 6 mo with no problems until the firmware change.  Now the batteries don't register with the camera, but haven't seen any perfomance issues, the charge indication still works.


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