It sometimes seems as if existing 8x10 shooters positively discourage others from trying 8x10.
Not everybody's motives, interests or priorities are the same.
All said, I really appreciate the interest you people take in a situation that does not relate to you.
Edit: I also recall that you were struggling to get enough light for your 4x5 portraits. 8x10 makes it four times (two stops) worse!
Am I misunderstanding this?
If my 4x5 camera needs 1/60 at f11 I would need to use 1/60 at f5.6 on an 8x10 assuming the same lighting?
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After reading all the comments I think it would be wise to get more experience in 4x5 before jumping to 8x10.
Cheers
Raffay
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After reading all the comments I think it would be wise to get more experience in 4x5 before jumping to 8x10.
Cheers
Raffay
Sent from my iPad using Tapatalk
How would you rate this deal?
http://www.ebay.com/itm/350939661275?ssPageName=STRK:MEWAX:VRI&_trksid=p3984.m1423.l2661
It's not quite that bad.
To get the same DOF on 8x10 as on 4x5, you need to stop down 2 more stops. So if you can hit 1/60 f/11 on 4x5 then you can use exactly the same exposure for your 8x10, but your DOF will be approximately halved because the lens is 2x longer for the same field of view (480mm instead of 240mm, for example). You would need 1/15 f/22 to make the same photo, and suddenly you're in the realm of subject motion.
While f/5.6 plasmats are very cheap and commonly available for 4x5, the affordable lenses for 8x10 are often f/9 process lenses so you maybe can't shoot at f/5.6 even if you wanted to. A 240/5.6 is a reasonable portrait lens to shoot on 4x5, but there is no such thing as a 480/5.6. You can buy a range of 450-480mm lenses around f/9 to f/12.5 but they are either huge and expensive (112mm filters, 2kg+, $thousands) or they have tiny apertures.
As I recall from posts on LFPF, Raffay was having issues with exposures being about 1-2s with his lens wide open, which was causing softness in portraits taken in nice shade. This was my main reason for recommending that he get hold of some artificial light. 8x10 will just make those problems worse, especially if he is forced (for price reasons) to shoot xray film which is about 3 or 4 stops slower than what you can easily achieve with HP5 or TMY2.
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