Letus adapter - problem or not?

T

trez

Well-known member
I know I can't stop my 35mm lens when using DOF adapter with vibrating gg. Some people say their limit is f5.6, other say it's f4.0. However, with my Letus Economy the gg pattern is clearly visible at 2.8 when the lens is pointed at smooth, evenly lit area.
I dismantled the adapter and inspected it, but it seems to work - the motor is running and the gg is vibrating. I wonder if the amplitude is sufficient - I can hardly tell the gg is vibrating by looking at it, but its movements become apparent when I focus on the gg and turn it on.
Here's how a wall in my bedroom looks at f2.8 (50mm lens):
http://www.flickr.com/photos/31103720@N07/2948061858/
The wall was poorly lit - sorry. But I get the same problems when shooting sky :(
Anyone using Letus adapters who can confirm this is standard behaviour? I consider getting rotating adapter, because it drives me crazy.

And yes - I have new alkaline batteries ;)
 
yah its not vibrating right. the pattern should have more of a swirl to it if its right. One of the rubbers on the pegs might not be seated correctly.
 
I'm just about to try to adjust the gg position. I'm afraid because the power connections seem so fragile. Anyway - the moment is right - I haven't been drinking for about a week, so my hands don't shake too much ;) So... I'll hold my breath and take the risk... Will let you know if the patient survived ;)
 
Success! The gg frame was pushed too far on the pegs. The whole thing was too stiff and wasn't vibrating properly. I adjusted it and now I can stop down to f4.0, maybe even 5.6. Hurra!
 
is it just me or does it seem alot of people on this forum have problems with their letus adapters?
 
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