August 22, 2014, 02:39:12 AM

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Topics - sdsr

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Lenses / EF-S 10-18mm - a few early photos on SL1 & Sony a6000
« on: June 11, 2014, 10:15:46 PM »
I received mine a couple of days ago and briefly tried it on two successive days walking home from work via City Hall in Philadelphia, the first day with it attached to the Sony a6000, the second to the Canon SL1.  Here are a few photos from each day, mostly within parts of the building.  All off-the-cuff, hand-held tourist-dodging stuff, mostly at 10mm, nothing fancy:

https://www.flickr.com/photos/125326482@N07/sets/72157644720350428/

In some there's a bit of flare and ghosting (in a couple of the outdoor shots on the Canon the lens was aimed at the sun), some of which may be related to the cheap filter that Adorama threw in for free (I'll try it later with no filter and then with a better quality one).  All are raw files processed via lightroom 5; a few had shadows lightened (the outdoor light was hideous each day), but otherwise the tweaks were minor. 

I'm amazed by how little distortion the lens creates - most of the time I saw nothing that needed correcting, though just for the heck of it I applied the lens profile for the 11-22mm EOS-M (it worked better than the profile for its predecessor; there's no profile for the new lens yet, of course).  It's miles better in terms of distortion at 10mm than the 24-105L is at 24mm, for instance, and better than any other similar wide-angle lens I've tried (if my memory is right, that is).

I included a few Sony a6000 photos to show the far-corner vignetting I mentioned elsewhere.   (Aside from that vignetting - which only shows up at 10mm, varies with the light and often disappears completely with minor distortion tweaking - I'm inclined to think that the photos it makes on the Sony are on the whole slightly better when viewed closely, but it would take controlled testing to reach a firm conclusion either way; I'll leave that to someone else....)

Anyway, make of them what you will....

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Lenses / Superzooms, again
« on: April 18, 2014, 02:19:30 PM »
After all the angst about whose 50mm primes are trash, this might amuse (sorry if it's already been posted somewhere, but if it was I couldn't find it).  The fact that it's about Nikon is neither here nor there, though I guess some may want to complain about that, too....

http://photographylife.com/question-18-300mm-lenses-part-deux


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EOS Bodies / SL1/100D vs EOS-M image quality
« on: October 27, 2013, 07:51:46 PM »
(Apologies if this has been asked/answered before, but if so I can't find it.)  I couldn't stand using the EOS-M but was impressed by its image quality as far as APS-C sensors go, somewhat better than the Rebel I briefly used for a while as a back-up.  Can anyone who has used both in RAW mode say whether the SL1 offers similarly improved image quality?  (There are lots of reviews of each around the web, of course, but the only comparisons I've seen are of out-of-camera JPEGs and thus useless.)   Thanks in advance.

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Lenses / Cicala on Lens testing
« on: October 10, 2013, 02:30:03 PM »
Yet another blog article by Roger Cicala that's worth reading:

http://www.lensrentals.com/blog/2013/10/there-is-no-perfect-lens-test-either


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Lenses / Yet another question re ultrawide lenses
« on: August 30, 2013, 11:09:13 AM »
I would like a lens, preferably for FF, that goes wider than my 17-40 L and with less mushy corners.  I've rented Sigma 12-24 II and Tokina 16-28 and both of those - the copies I rented, anyway - were much better on the edges and in corners.  I've also owned and/or rented on APS-C Sigma 8-16 (quite good) and Tamron 10-24 (bad), but with no overlap to compare with 17-40 on FF.  (Faster apertures would be preferable as I tend to use such lenses for interiors rather than landscapes, and in buildings where tripods are usually verboten.)

I'm fairly familiar with the various recommendations for lenses that fit on Canon and Nikon bodies, am aware that for many the ne plus ultra zoom is the Nikon 14-24, and have also seen comments here to the effect that some crop lenses for Canon yield better results on crop bodies than FF lenses on FF bodies (though I don't think these have ever been backed up by examples).

My question is cross-format and cross-brand.  What are the best ultrawide lenses, period, regardless of brand or sensor size?  Are there any sites where one can find comparisons showing the same scene shot by, say, Nikon 14-24 on FF vs Panasonic 7-14 (14-28 equiv.) on M43 vs Canon 10-22 on APS-C?  Anyone here have any personal experience of such a comparison?  I've not run across anything along those lines (perhaps it's an unreasonable request), but maybe my searches haven't been thorough enough....   

TIA

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