February 11, 2016, 11:05:11 PM

Recent Posts

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Because it is only the lenses with very large elements, and flourite elements that are adversely impacted by the differential heat charachteristics, I only know of one flourite element lens Canon made that isn't white, though I might be wrong, and that was the first one they made, a 300 f2.8 with a green (not DO) ring. If there are black flourite lenses then the elements are smaller.

As to why all lenses are not white, well they don't need to be, and whilst it might have turned into a marketing gimmick it started out for very real reasons,...

You said it right there. White was originally chosen for scientific reasons but is now a marketing thing.
Animal Kingdom / Re: Hummingbirds from Colombia
« Last post by rpt on Today at 09:24:45 PM »
Excellent pictures Glenn. Maybe a bit slower shutter speed for the flight pics would accentuate the flutter of the wings.
Landscape / Re: Post your Panoramics!
« Last post by slclick on Today at 09:21:49 PM »
I Get Twisted by Sam  Yee, on Flickr

5DSR + 16-35 f4 IS

Very cool framing! Love how it stopped me in my tracks as I scrolled through this thread.
Third Party Manufacturers / Re: Sigma Teasing New Faster Than f/2.8 Zoom?
« Last post by 9VIII on Today at 09:20:22 PM »
I just like reading "85f1.4", and when you combine everything and get "55-85f1.4 OS", it makes me feel tingly all over.

Not that lt'll happen, but we love talking about it.
Animal Kingdom / Re: Hummingbirds from Colombia
« Last post by slclick on Today at 09:19:23 PM »
Beautiful hummers, thanks for sharing!
EOS Bodies - For Stills / Re: Flashing AF point -1 Dx. Why ?
« Last post by Dholai on Today at 09:10:43 PM »
Got it - it is gone !
Thanks everybody and thanks Neuro.
What would I do without you guys!
Technical Support / Re: DOF
« Last post by slclick on Today at 09:05:14 PM »
[quote author=chrysoberyl link=topic=29050.msg577150#msg577150 date=1455138728euro: Thanks!  Photo Aide appears to be what I want.  So for macro, there is little difference for inanimate subjects.  But for wildflowers, APS-C would be better - at least for DOF.

It all depends on the flower and the sensors.  The other factor is diffraction - larger pixels (usually but not always in the FF) mean you can stop down further before diffraction starts costing you sharpness, and if using ambient light the ISO noise when you stop down for similar DoF on FF will be about the same.  Practically speaking, there's not much advantage either way...I generally use FF for macro/close-up.

Love these lessons!
Technical Support / Re: DOF
« Last post by tolusina on Today at 09:04:08 PM »
Have you tried the Stop Down Preview/DOF Preview button and simply view the results of aperture changes for any scene instantly?

Works the old fashioned way through the viewfinder.
Works in live view, best with exposure simulation activated.
Photography Technique / Re: New to photography.
« Last post by slclick on Today at 09:01:36 PM »
As stated above, education, is key. Be it, community college, online, seminars whatnot. Personally I prefer in person so you can interact with others who have recently or currently are at a similar level of skill to compare notes and be of assistance to each other. Many times it's been said, shoot in the beginning with one lens, such as a 35mm or 50mm and learn to compose, frame, sneaker zoom, explore various depths of field and learn it well with that one general piece of glass which will transfer to other focal lengths and aperture ranges. Learning to capture and manipulate (and understand) light is a wonderful thing, it's both art and science.
85/1.4 OS


"By the shape of the outline, it looks like they may be teasing a telephoto zoom lens faster than f/2.8."

And the outline is probably not of the new lens.

and we could go round and round with this ;)
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