Pentax 645 (non AF) with 120 mm Macro and Ringflash?

I own the Sunpak DX12R and I am not too happy with it. I feel the flash is
not strong enough. It has a guide number of 40. I have used it on my
Pentax 645N with the Sunpak PT2D
module and using Kodak ektacrome 100 film setting my 120mm lens at 1:1
macro and shooting at f16 to get good depth of field I find that the film
came back 1/2 to 1 full stop under exposed. I would recommend trying it
before dropping almost $300.00 on this setup. Let me know it any of this
helps I am going to test it some more but I think I will go back to a
dedicated flash held off camera. I have the Pentax AF500FTZ flash (guide
number 160) that I use off camera with a dedicated TTL cord and get good
results.
Dr. Georg N.Nyman wrote:
 > Hi,
 > I would like to ask you guys out there if one of you is working with a
 > ring flash on the non-AF Pentax 645 with the 120mm macro lens - does
 > anything exist which works?
 > Looking at the information, the Pentax ringflashes seem to work only
 > with the 75mm lens on the Pentax 645 - so one would need to either use
 > the macro rings or the bellows, but how about the 120mm macro??
 > Any ideas? Thanks - George<!-- ~MESSAGE_AFTER~ -->
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