----- Original Message ----- From: "dbmills" <dbmills@xxxxxxxxx>
To: <rollei_list@xxxxxxxxxxxxx> Sent: Saturday, March 13, 2010 2:35 PM Subject: [rollei_list] Re: Rolleiflex for sale
I'm sorry Richard. My error in inadvertently sending it to the list.I undoubtedly erred in referring to the booster spring because all of myother Rollei's have used them for the highest speed.I omitted mentioning that my shutter tester indicates that the times for 1/250 and 1/500are the same. Don
I thought it was probably sent in error. I don't know what has happened to the shutter but you should talk to Harry about it. Note that on a simple shutter tester the high speeds will read low. The worst is the hightest speed, 1/500th or 1/400th, which is calibated for the effective exposure with the iris wide open. For the center of the shutter the speed will typically be about 20% longero, i.e., about 1/400th for the 1/500th setting. I think the repair manual says 1/390th. The opening and closing times of the blades is enough to reduce the efficiency of the shutter significantly at the highest speeds. Nonetheless 1/500th should read noticably higher than 1/250th so there is definitely something wrong.
-- Richard Knoppow Los Angeles, CA, USAdickburk@xxxxxxxxxxxxx
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