Author Topic: a850 or a900 iso & full frame lens question  (Read 3606 times)

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Offline iant21

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a850 or a900 iso & full frame lens question
« on: November 14, 2010, 10:43:06 PM »
Hi,

Please forgive me if this has been asked before.

The type of photography i do i live gig photography, which generally requires f2.8 and highish iso's

I am currently using an a700 with a sigma 10-20 f3.5

What i would like to know is, is the iso performance of the a850/a900 the same of better than the a700?

Secondly i own sony 24-70 2.8, will the performance of this lens be better on a full frame camera as apposed to my a700 as it is designed for full frame?

many thanks in advance.

if you want a mooch at my pictures please take a look @ www.iantaylorphotography.co.uk

Ian

Offline d7d (aka Ronin, aka Shot by scott)

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Re: a850 or a900 iso & full frame lens question
« Reply #1 on: November 15, 2010, 09:58:48 AM »
Hi the "performance" (AF etc) of the 24-70 on the 900 isn't going to be a lot different. What will be different is your field of view, using the whole lens and not just the cropped centre :)

Offline Rob aka [minolta mad]

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Re: a850 or a900 iso & full frame lens question
« Reply #2 on: November 15, 2010, 04:30:13 PM »
I found the A700 better at dealing with noise than the A900 (and still do) so, if using in low light conditions then the A700 would be better.
However, since using CS5's ACR and its NR facility, some previously binned images have been turned into virtually noiseless images.



Rob

Offline Stef.

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Re: a850 or a900 iso & full frame lens question
« Reply #3 on: November 15, 2010, 05:03:37 PM »
I would say the ISO performance is pretty much the same. The firmware update of the A700 was included in the A900 so the high ISO shots are pretty much converted the same way. Nevertheless, for me noise is no issues if you use the new ACR. Re.: lenses on full frame. This is a peculiar issue...some lenses perform better on my A900 than on my A700 and others don't. On a general note: a full frame camera will use all of the lens while the A700 will only use the center part of it- the so called "sweet spot". Therefore, with full frame lenses it is much more vital to have good lenses with good corner sharpness than with APS size lenses.
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Offline iant21

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Re: a850 or a900 iso & full frame lens question
« Reply #4 on: November 15, 2010, 09:59:50 PM »
is the new ACR 6.1?

Offline Tom F

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Re: a850 or a900 iso & full frame lens question
« Reply #5 on: November 16, 2010, 01:08:40 AM »
The latest version is 6.2
a99 a77 a900

Offline Desmo

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Re: a850 or a900 iso & full frame lens question
« Reply #6 on: November 20, 2010, 02:14:05 AM »

Offline pointblank

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Re: a850 or a900 iso & full frame lens question
« Reply #7 on: December 04, 2010, 12:32:34 PM »
Depth of field is huge, it's like learning to walk all over again. And while using wide angles, such as the CZ16-35, they are reallyyyyyy wide on FF .. !

My lens arsenal consist of high speed lenses only (max aperture on all 2.8) and quality glass makes a huge difference on a FF body. Coming from the A700 I could tell the difference instantly. FF is the real deal, period!

Offline rogprov

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Re: a850 or a900 iso & full frame lens question
« Reply #8 on: December 22, 2010, 04:31:12 PM »
...... Nevertheless, for me noise is no issues if you use the new ACR. .......
Stef.

I absolutely agree with Stef. the latest (6*) ACR is a vast improvement. Incidentally the same ACR is used in Elements 8/9 as in PS and CS5 so you can get the benefit of the new ACR without the huge cost of PS/CS 5.
« Last Edit: December 22, 2010, 04:34:23 PM by rogprov »
Roger