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Re: Maco 820



My results with Maco 820 in 120 format were:

ISO of 3 or 1.5 depending on subject and including filter factor for B&W 092.

Processing: Xtol 1:2 in Jobo Rotary Processor 13.5 minutes @75F.

Film speed and development time were evaluated by taking densitometer
readings of appropriate zones on negatives.

The Maco gave me much more IR effect than SFX, but I have not shot HIE
yet to compare.HTH!-Fred

Jason Revell wrote:
> 
> Possibly not too much help to you, but I recommend you use a different
> filter to the 87, a R72 or 88A would be a better bet.
> 
> However I shot a roll through a couple filters to get a judge for film
> speeds to shoot at (hence me giving up on the 87!).  My rough results were
> as follows (on a Cannon EFM);
> 
> Cokin 003 (red) - 8 ASA when metered with the filter in place.  **Note :
> this gave no real IR effect**
> Hoya R72 - 1 ASA with no filter in place.
> Lee 87 - 4 stops below 3 ASA (a theoretical 0.19 ASA? now that is SLOW!)
> with no filter in place.
> (Other tests were done with a filtered Autometer with 5 degree's spot
> attachment, which works very nicely)
> 
> These films were processed in DiXactol a twin bath developer (which I do not
> rate), but I sometimes use it when I have no idea of film speed as it only
> has one dev time.  This then helps we work out a dev time to try with Xtol
> or PMK.
> 
> Jason
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