Author Topic: A900 - Lens IQ Sample Images and Discussion  (Read 31835 times)

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Offline Stef.

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #30 on: January 20, 2009, 05:38:54 PM »
Simon- your point is interesting. For my shooting style though the CZ 24-70mm is pretty much as good as it can get. It is superbly sharp and as far as I can tell I did not have problems with bokeh so far. I am at the moment more intersted in a wide angle alternative to the CZ 16-35mm as this is a focal length that I don't use that much and therefore I am a bit reluctant to fork out $1000+. Any suggestion on that front- and no I am not interested in second hand lenses via eBay.
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Offline Simon [aka springtide]

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #31 on: January 20, 2009, 05:51:02 PM »

I think your only option is the Tamron 17-35.

Take a look at the full size image that I posted of the pub, as well as the resized image with the CA's removed etc.

Personally I think it's an improvement over my A700+11-18 (and I owned two 11-18, the second one being the sharper).

I think Rob must have an unusual 'sharp copy' as Rob has stated that his A700+11-18 is sharper (even when the A900 file is resized).  I think with the A900+17-35 you'll be able to print at A3 without any problems.  I guess it's only if you want to make the most out of the A900's resolution it's a problem (we are the reverse with our requirements I think, I would like more resolution from my 17-35 rather than my 24-70!!!)

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Offline Stef.

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #32 on: January 20, 2009, 06:48:07 PM »
I will have a look at it. Just dug out a really old lens: Sigma 18-35mm lrnd from ages ago. It used to give me good results on my old film cameras... am testing it today- don't expect too much though!
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Offline mtiller

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #33 on: January 20, 2009, 09:35:11 PM »
Stef,

The Sigma 12-24 is supposed to be a good lens.
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Offline Simon [aka springtide]

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #34 on: January 20, 2009, 10:15:27 PM »
Stef,

The Sigma 12-24 is supposed to be a good lens.

FYI
The only problem with the Sigma 12-24 is that it only takes gel filters on the rear (so no filter thread on the front) - meaning for Landscapes you can't really use slot filters (Lee etc).

I posted the options at: http://www.dynaxdigital.com/index.php/topic,8328.15.html which were (for FF):

Sigma 12-24 (uses rear gelatine filters & can't use filters on the front)
Sigma 15-30 (uses rear gelatine filters & can't use filters on the front)
Sig 17-35 (out of production)
KM 17-35 (Rebadged Tam and obviously out of production)
KM 17-35G (as expensive as the CZ even secondhand and obviously out of production)
Tam 17-35

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Offline Stef.

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #35 on: January 20, 2009, 10:33:21 PM »
Simon- I have decided I will go for the new CZ16-35mm. I have tried the old Sigma 18-35mm today and the 10-20mm which is not ff- but nevertheless gave it a try on the A900 in cropped mode (11mp). Unfortunately I tried it against the CZ 24-70mm @ 35mm and there were worlds between them- even closed down to f8/ f9.
I might not buy the CZ16-35mm straight away as I really want to see how often I use the wider end of my lenses. 24mm of my current CZ is already pretty wide for landscape and I am not sure how much wider I really need (not want ;))
I assume very much that Sony will have to come out with some really good lenses in the future particulalry if they come out with more ff cameras. In all honesty- I think when you deal with this kind of resolution you should really go for the very best there is.
Anyhow- let's wait and see what happens at the PMA soon!
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Offline Rob aka [minolta mad]

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #36 on: January 21, 2009, 05:53:59 PM »
Quote
I might not buy the CZ16-35mm straight away

:-)



Rob

Offline Simon [aka springtide]

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #37 on: January 21, 2009, 08:07:42 PM »
Quote
I might not buy the CZ16-35mm straight away

:-)

Rob


Knowing Stef, I think she's left a few words out in the middle of the sentence.....

"I might not buy the CZ16-35mm straight away, as they don't appear to be available for purchase yet."

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Offline Stef.

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #38 on: January 21, 2009, 08:26:07 PM »
Hehe! You seem to know me quite a bit...but seriously I really want to see whether I need it or not. At the moment we have fog here since a week so it is hard to try out how sufficient the CZ 24-70mm is for landscape. Also I would love to see some more reviews about it. With this lens it is similar for me as with the longer lenses: I have got a couple of those but hardly ever really need them. I am not a wildlife photographer. What I really want is a good fast 50mm lens purely for size reasons and because I do like to shoot with prime lenses.
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Offline Bill

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #39 on: January 21, 2009, 08:46:28 PM »
How about the new Sony ZA 58/1.4 SSM with the 77mm filter thread?  I hear it's in the $800 range but it has Minolta bokeh! Plus, 2 of its 8 elements are ED glass and 4 are ashperical, so CA and distortions are at record low levels.

:-D

:-P

:-D

Bill
« Last Edit: January 21, 2009, 08:50:00 PM by Bill »
a77 + vertical control grip, a700 + vertical control grip,  24-70/2.8 SSM ZA,  70-200/2.8 SSM G,  HVL-F42AM flash

Offline Stef.

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #40 on: January 21, 2009, 08:52:20 PM »
When is that supposed to come out? Very tempting... Why 58 and not 50?
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Offline Bill

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #41 on: January 21, 2009, 09:46:19 PM »
JUST KIDDING!!!!  :-D

58mm is what some of the old Minolta maual focus lenses were, plus 58mm would work out to 87mm on aps-c sensors.  I just thought it sounded like something I would be interested in!

Bill
a77 + vertical control grip, a700 + vertical control grip,  24-70/2.8 SSM ZA,  70-200/2.8 SSM G,  HVL-F42AM flash

Offline Stef.

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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #42 on: January 21, 2009, 09:53:21 PM »
Ouch! Bill- that hurts! Got my hopes up already! I assume though that Sony must come out with some new lenses to do justice to the A900! Wishful thinking?
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« Last Edit: January 22, 2009, 12:28:54 AM by Stef. »
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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #43 on: January 22, 2009, 12:10:07 AM »
58mm... Minolta style bokeh... low CA... [jaw dropping in slow motion]
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Re: A900 - Lens IQ Sample Images and Discussion
« Reply #44 on: January 22, 2009, 03:14:58 AM »
O.K. Today I did a lens test with the following two lenses and I have to say I am quite happy with the results:

Sigma AF 2,8/ 105mm DG Macro EX and Sigma AF  2,8/ 90mm Macro
Settings: RAW; ISO200; AWB; f5.6; HVL-F58AM flash bounced from the ceiling; converted in ACR; no sharpening at all

Sigma 90mm:


100% crop:


Sigma 105mm:


100% crop:


The results IMHO are very sharp and both of the lenses are usable on the A900.

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