-----Original Message-----
From: Robert Ashdown <RobertA@xxxxxxxxxxxxx>
>I'm writing for a friend here at work who has just purchased a new
>OM4Ti. He seems to have a big problem with TTL macro flash.
>
>He is using a 50 F3.5 macro on auto extension tube, with a T10 ring
>flash, TTL, 50ASA Velvia, to photograph insects. He has done this before
>successfully at apertures down to F22 with OK exposure with an OM2N,
>everything else the same.
>
>His OM4Ti blinks "underexposure" and indeed the shots are under-exposed
>until he opens up to about F8.
>
>This thread was discussed earlier in the year. Can anyone shed any light
>on this? Is the OM4Ti less capable of handling TTL flash at this range
>than the OM2N?? Is there another reason?
>
Despite some claims to the contrary, this is exactly the same results I had
right down to the f stops used. My solution is to use an OM-2N for macro
flash. I wish I had an OM-4 series to do some scientific testing with a
flashmeter, but I sold mine for this very reason. John H. was the one who
brought the TTL flash range problem to my attention. You can also not use
TTL flash, but this requires a bit of testing for proper exposure.
Doug
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