Hmm. Don't take it too too personally, but you're nuts.
Originally Posted by Buster6X6
Filling the frame with a single bloom will often require you to work above 1:1. This ain't easy and there's very little depth of field. To learn more about what you're up against, buy a copy of Lester Lefkowitz' book The Manual of Closeup Photography. Out of print, available used through, in alphabetical order, www.abebooks.com, www.addall.com, www.amazon.com,and occasionally on eBay.
Not knowing more, I assume that you have 300 mm of extension +/- to play with. If that's so, your best bet is probably the Componon. I expect its in a #0, if so you can easily switch the elements around (front to back, back to front) when working above 1:1; up to 1:1 it will work better facing normally.
The SA will get you to a little above 2:1 and, again, it should be reversed above 1:1. Might work well enough, worth trying.
You might consider buying one of the cheap ex-MP-4 75/4.5 Tominons and an equally cheap ex-MP-4 Copal #1 Press with no diaphragm to hold it. These things turn up often on eBay, you're looking at at most a $80 expenditure. And that will take you to around 3:1. Or maybe even an ex-MP-4 50/4.5 Tominon, will get you to 5:1 but won't come close to covering 4x5 near 1:1. I've had both lenses; they're not the best, which is why mine are in the past tense, but they're also good enough.
Don't even think of using your 150 Sironar or longer lenses, your Componon is the best tool you have for this job.
FWIW, I went up to 2x3 because I was dissatisfied with flower pictures taken on 35 mm. On 35 mm, I could get good detail in the bloom OR a nice shot of the bloom in its setting. I can often shoot 2x3 at a magnfication no higher than I'd use for just the bloom on 35 mm and get both. In my limited experience, the benefits of shooting on a format larger than 35 mm above 1:1 are often illusory. Read Lefkowitz.
Last edited by Dan Fromm; 01-26-2006 at 10:30 AM. Click to view previous post history.