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Electronic Theatre Controls Inc

Difference Between a Source Four Rev A and Rev B 70º Lens Tube

Symptoms/Issue

The Rev B lens retainer ring will not fit inside of my Rev A 70º lens tube. 

Description/Explanation of Issue

In the Rev A 70º lens tube, the retainer ring [7060A3186] and the rear plate [7060A3185] have three screw holes. 

In the Rev B 70º lens tube, the retainer ring [7060A3209] and the rear plate [7060A3210] have four screw holes evenly spaced. 

Fix/Solution

Due to the rivets holding the lens tube together, a 70º lens tube may not be taken apart in the field. Instead, the lens tube will need to come into the factory for a repair. 

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