edit 5/20/08 - have a 18" buhl, you'll see later in the plog. Wish I listened on this one. hind sight 20/20 and all that. used the 320mm triplett and 330mm/220mm fresnels. To use the buhl I need to extend the pj and get a new fron fresnel.
QUOTE (Durachko @ Feb 29 2008, 03:33 PM)

The front fresnel and triplet must be "matched" for acceptable results.
ah, I have been reading* more today and I saw a couple posts on that, since* its ordered and *payed for thats what I'm stuck with. The 650 was put in for 2 reasons 1) I saw many posts that using a 15.4" wuxga lcd sourced* from here ( mind you I'm arguing, mearly explaining how I came to such a conclusion)
update - having re-read the sticky I see I read it wrong. DOH!!!
15.4" wuxga stickyhowever whats done is done, I have room to upgrade the triplet in the future I guess. Thanks for the wake up on that guys - not sure wtf I was thinking. so heres the question now - do I call and drop the pro fresnels and etc or just sorce a new trip - and with the 650 + pro trip or an equive ( such as an 18" bes etc) have over the 395 fl fresnels and the s15?
I'm looking at 1.39+- : 1 for the corners ( really* ruff math based on 220fl collector fresnel and a 15.4" lcd ) I just don't want dark corners. I can see now that the 320 fl of the s15 and the 650 of the field fresnel are , um, uneven to say the least.
ok off to search of an 18" then though 18" = 450mm..... < 650... ? arg need to lurke more
edit for spell check