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Larry F
Carpal Tunnel
Reged: 05/24/04
Posts: 1598
Loc: Westchester, NY
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I took a look at the front element of my Coronado B10 diagonal, and noticed concentric rings in the filter. They are clearly reducing transmission a bit. Is this the dreaded rust problem, or is it something normal that I simply hadn't ever looked at before?
Edited by Larry F (10/25/09 09:38 AM)
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swisswalter
sage
Reged: 03/29/09
Posts: 414
Loc: Eastern-Switzerland
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hi larry
IMHO that does not look very normal nor good
walter
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only dust in the wind, TAK on GM8, Lunt 60, DMK31,still greenhorn, but as a golfer used to be humble
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Lost in Space
Vendor - Galactic Rocks
Reged: 11/14/04
Posts: 1851
Loc: North Carolina
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Hi Larry,
I'm not sure what your BF-10 has going on there. If it has degraded the image, then it is likely that the filter is degrading somehow.
AFAIK, the warranty was 5 years (at least that's what my BF-15 has) and it is presently at Meade for repair. They estimate sixteen weeks for turnaround on repairs as they ship it to Mexico for repairs after they get it from you. I guess they wait until they get a batch of items to be repaired and send them in a bulk shipment.
Here's what my rust problem looked like.
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Ed
Televue TV76
Coronado SM60/BF15
Meteorite Collection
IMCA #8911 - http://www.imca.cc
“A graduation ceremony is an event where the commencement speaker tells thousands of students dressed in identical caps and gowns that 'individuality' is the key to success." - Robert Orben
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Larry F
Carpal Tunnel
Reged: 05/24/04
Posts: 1598
Loc: Westchester, NY
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Thanks guys. It's definitely not like what you are showing, Ed. Just concentric rings and clearly reduced transmission.
The scope (Maxscope 40) is serial #567, purchased in December 2002, one of the original Coronado's with the small Borg helical focuser, and it's long out of warranty. I can try Meade for a repair, but since I've got to pay $$ to fix it, maybe Lunt would do it? I'll write them too.
BTW Ed, I remember Uncle Floyd on NYC cable TV around 1979-80. He was funny, especially when you were stoned.
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5 1/4" f/5.2 home-built Newtonian
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