Author Topic: I blame it on David Stallard  (Read 10204 times)

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Offline REX (aka TG)

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Re: I blame it on David Stallard
« Reply #15 on: October 11, 2010, 04:32:05 AM »
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Offline david-stallard

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Re: I blame it on David Stallard
« Reply #16 on: October 11, 2010, 10:21:57 AM »
David is going back to a700 ?

http://www.dynaxdigital.com/photography-equipment-for-sale/a900-body-only/msg133309/#new

I am indeed, it's a completely personal choice - I prefer the 700, don't like the shallower DOF on the 900, have now tried a good selection of my 'normal' subjects - motor racing / gardens / wildlife / Zoo's and have done a good comparison and for me and the way I work the 700 is better.

The 900 is in immaculate condition and someone will be very happy with it (sooner rather than later I hope ;) )

.DAVID.
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Offline REX (aka TG)

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Re: I blame it on David Stallard
« Reply #17 on: October 11, 2010, 12:51:11 PM »

I am indeed, it's a completely personal choice - I prefer the 700, don't like the shallower DOF on the 900,

.DAVID.

I like the shallower DOF this one of the main reasons i am for FF. What i will miss on FF is the on board flash i always wanted to have a small flash on FF body like Minolta did with Dynax 9
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Offline Fud

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Re: I blame it on David Stallard
« Reply #18 on: October 11, 2010, 02:00:09 PM »

I am indeed, it's a completely personal choice - I prefer the 700, don't like the shallower DOF on the 900,

.DAVID.

I like the shallower DOF this one of the main reasons i am for FF. What i will miss on FF is the on board flash i always wanted to have a small flash on FF body like Minolta did with Dynax 9

OK this one is confusing me ??? 

If I enter on my Simple DOF calculator application using my 600mm at F6.7 at 30m I get these answers for the A900 and A700 for the depth of field

A900  Front 29.51m Rear 30.50m giving DOF 0.99m
A700  Front 29.67m Rear 30.33m giving DOF 0.66m

If I enter on my Simple DOF calculator application using my 300mm at F6.7 at 30m I get these answers for the A900 and A700 for the depth of field

A900  Front 28.13m Rear 32.14m giving DOF 4.01m
A700  Front 28.72m Rear 31.39m giving DOF 2.67m

Therefore FF gives you greater DOF than the cropped sensor which in fact shows that the cropped sensor reduces the DOF by a third
A900+VG, A77+VG, Minolta 17-35G,  Sony CZ24-70 F2.8,Sony 70-200 F2.8 SSM, Sony 70-400 SSM, Sony 135STF,85 F1.4, 200 F4 Macro, 600 F4 HS APO

Offline Asher

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Re: I blame it on David Stallard
« Reply #19 on: October 11, 2010, 02:17:42 PM »
That is for the same distance but what you need to compare is for the same field of view.

You can do this by comparing

A900: 150mm f2.8 at 10m
A700: 100mm f2.8 at 10m

or

A900: 100mm f2.8 at 10m
A700: 100mm f2.8 at 15m

edited for typo :)
« Last Edit: October 11, 2010, 09:20:21 PM by Asher »

Offline Fud

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Re: I blame it on David Stallard
« Reply #20 on: October 11, 2010, 02:40:21 PM »
But that assumes you can vary your field of view.  In my case I am normally shooting at the end of the range of my lenses i.e 400mm on 70-400 or using my 600, so would use the lens at 400mm whether I use the 900 or 700.  What I will get is obviously a wider field of view with the 900 but if I then cropped it down to the 700 field of view (and would therefore have an image approximately the same size) the 900 image would have a greater depth of field than the 700.  The whole thing of this depth of field being greater with cropped sensor is only if you vary your focal length to get exactly the same field of view.
A900+VG, A77+VG, Minolta 17-35G,  Sony CZ24-70 F2.8,Sony 70-200 F2.8 SSM, Sony 70-400 SSM, Sony 135STF,85 F1.4, 200 F4 Macro, 600 F4 HS APO

Offline Asher

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Re: I blame it on David Stallard
« Reply #21 on: October 11, 2010, 03:18:48 PM »
if I then cropped it down to the 700 field of view (and would therefore have an image approximately the same size) the 900 image would have a greater depth of field than the 700. 

This is not true, the depth of field would be the same. (The A700 is a crop of the A900).

Offline david-stallard

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Re: I blame it on David Stallard
« Reply #22 on: October 11, 2010, 03:46:56 PM »
Confused. . . . you bet.

Can I put it another way - 'I' am happier with the 700 than the 900.

.DAVID.
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Offline REX (aka TG)

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Re: I blame it on David Stallard
« Reply #23 on: October 11, 2010, 09:04:19 PM »
Here is the answer by DK

Depth of field

.......Throughout the domain of the APS-C DSLR, the small sensor format has transformed things. For the same angle of view, a full frame film camera needs 1.5 f-stops more stopping down to get the same depth of field (sharpness in depth). So, a shot which would be sharp enough from foreground to background at f/8 on an Alpha 700 must be shot at f/13 on full 24 x 36mm.........


http://www.photoclubalpha.com/2008/10/16/do-you-really-need-an-alpha-900/
« Last Edit: October 11, 2010, 09:08:45 PM by TG »
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Offline david-stallard

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Re: I blame it on David Stallard
« Reply #24 on: October 11, 2010, 09:12:59 PM »
AHHHhhhhhhhh  in a dilemma now - Cory has made me go through all the photos from both cameras and I cant decide what to do now.  Worse than a woman with someone else's credit card [gonna pay for that one]

.DAVID.
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Offline Rob aka [minolta mad]

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Re: I blame it on David Stallard
« Reply #25 on: October 11, 2010, 09:25:49 PM »
I must agree, that from personal experience that i always shot at f/8 on the A700 and have found that with the A900 have always needed to stop down to get the 'front to back' sharpness of a landscape image that the A700 would produce.
Generally tend to shoot at f/11 now with the A900.


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Offline david-stallard

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Re: I blame it on David Stallard
« Reply #26 on: October 11, 2010, 09:37:25 PM »
I have asked Fud to remove the for sale post for now and I'm going to give it one more shot at the weekend as I have another car shoot to do, yes I know that given my track record I will probably suss it out what I'm doing wrong and everything will 'click' into place and that will be that.

I do have a question about the flash but I will post that in the correct section

.DAVID.

Debates are helpful. . . . apparently
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Offline Rob aka [minolta mad]

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Re: I blame it on David Stallard
« Reply #27 on: October 11, 2010, 09:49:07 PM »
I have asked Fud to remove the for sale post for now

.DAVID.

Fud wont be able to remove it.
Only mods are able to do that, so i have done it


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Offline david-stallard

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Re: I blame it on David Stallard
« Reply #28 on: October 11, 2010, 09:53:36 PM »
My mistake - sorry  oh and thank you

.DAVID.
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Offline david-stallard

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Re: I blame it on David Stallard
« Reply #29 on: October 19, 2010, 04:49:20 PM »
Hi - my name is David and I have been a complete arse!

Ignore ALL of my previous rants regarding the 700 and the 900, I purposefully left the 700 at home for the weekends classic car shoot and gave myself an intensive learning course on shooting with it in Manual, this is what I found:

The 900 is EASILY capable of handling motor sport events, the only downsides that I can see are that it EATS MEMORY like you wouldn't believe, partly because I take a lot of shots and ALL in RAW - this weekend I took 2270 photo's and kept 1219 of them, it would have been more kept but I am finding that I am now getting more fussy and some that before I would of happily saved I am now deleting - being 'brutal' is a must for this kind of event. The other 'problem' (if you can call it that) is that now I have got my head around just using the Manual setting I find it hard to use anything else, this in itself throws up a problem with sports - the suns out then it's behind a cloud, then it's dark grey and then light, which means I am constantly changing the settings from one shot to another which can be frustrating but also very rewarding, little things like no auto iso so when it get's darker it's down to you to change.

I will post up a couple of my favourite shots once I have finished going through them all again and have uploaded them to my gallery (shame we can't upload here direct from our PC's) I have had a real blast and I'm so glad that I took your advise (you know who you are) and gave the 900 another go and also that I gave myself no other option by leaving the 700 at home.

THANK YOU all again

.DAVID.
Right Place, Right Time - I Wish

Take only photo's and leave only footprints!