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11-02-2009, 05:00 PM   #16
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QuoteOriginally posted by 8540tomg Quote
Personally, I don't recall noticing any flare issues with my A 100/2.8 macro. I don't doubt they happen I just haven't noticed them. Then again, as I've said before, I don't use the lens that often. When I have used it I found it to be super sharp. Are there any conditions in which this flare issue is more likely to occur?

You're right Schneider, this is a good place to keep abreast of things.

Tom G
I first noticed it when I was doing product shots of my Pentax 6x7 gear.
A good reflection off the subject can cause a fairly minor reflection off the back of the lens.
It's pretty obvious in this shot.


Last edited by Wheatfield; 02-05-2011 at 08:44 PM.
11-04-2009, 04:07 AM   #17
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QuoteOriginally posted by schneider Quote
All things considering I have decided for the A. Although I expect the F to have the slight edge in IQ, to me the manual focussing tips the balance.
So you think the F is a bit sharper huh? I don't know but when it comes to lenses like this and this close in IQ it really is difficult to say for sure. We are all splitting hairs. I guess that goes for all the macro lenses I have went thru, all of them have been fantastic lenses.
I had the FA 100 and although I loved how sharp it was I did not like the focus ring, way too small. The A 100 is wonderful in that regards. I think your F 100 is pretty much like the FA, right?

wheatfield, for this type of shot and conditions I am not sure if I see a problem. I don't know though, I am still on my first cup of coffee.
11-04-2009, 05:40 AM   #18
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I'm with OrenMC on this one Wheatfield. Perhaps it's my monitor but I just don't see any senosr reflections in this image - or maybe I just don't know what to look for.

Tom G

Last edited by 8540tomg; 11-04-2009 at 05:41 AM. Reason: typo
11-04-2009, 06:18 AM   #19
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QuoteOriginally posted by 8540tomg Quote
I'm with OrenMC on this one Wheatfield. Perhaps it's my monitor but I just don't see any senosr reflections in this image - or maybe I just don't know what to look for.

Tom G
Look at the big blue spot above the base on the top extension tube.

11-04-2009, 03:32 PM   #20
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Yup, now that my eyes are open. I don't know what I was looking at earlier.
11-04-2009, 07:48 PM   #21
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QuoteOriginally posted by Wheatfield Quote
Look at the big blue spot above the base on the top extension tube.
OK, I see it now too. So reflective surfaces are potentially an issue with this lens. Good to know.

Tom G
11-05-2009, 06:08 AM   #22
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Clear example. I wonder if the F/FA version would not have produced this flare.

Anyway, so much talk without a picture, time for a break:

11-05-2009, 07:36 AM   #23
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QuoteOriginally posted by Wheatfield Quote
I've had a couple of problems with sensor reflections on my A100/2.8 macro, so I'm kinda careful with what I do with it now. I don't know if the F is better or not.
The A version is an absolute gem, it is one of the sharpest lenses I've used, and gives a 3 dimensionality to macro images that I find very pleasing, so I'm kinda pissed about the reflections off the rear element.
This image shows what I am talking about with the 3dimensionality that I see from the A100/2.8 macro.


nice shot.

You should post your comment about sensor reflection in the thread on FA lenses for full frame digital, because there are some non believers out there.

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