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[OM] OM1: Good vibrations?

Subject: [OM] OM1: Good vibrations?
From: kelton <kelton@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 30 May 99 17:13:15 -0700
>I don't know about the rest of you, but I was dissapointed by the 
>difference in
>sharpness of the AWESOME 250/2 between the OM-4 and the OM-1 with MLU. 

I was also surprised that the OM1 with mirror lockup still allowed a 
considerable amount of vibrations (we assume) to degrade the image of the 
250. It has long been lore amongst us astrophotographers that the best 
way to operate a camera's shutter is to time the shutter with a HAT 
rather than the camera's controls. Yeah, that's right: let your hat hover 
over the front of the lens, fire the shutter, wait a second, remove the 
hat, time off the exposure, replace the hat, and close the shutter. It 
has worked great for me at nighttime, but I suspect it'd take some pretty 
fancy hatsmanship on the part of you daytime photographers. 

I should also add that the diaphram blades within the 250 are massive 
things; I suspect that diaphram vibrations are a concern especially for 
180/250/350 owners, but I guess Gary's tests will tell us if this is the 
case. 

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