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Pete Ganzel | all galleries >> Tinkering >> Dissasembly and Repair of Minolta Maxxum AF 50mm f/1.7 and f/1.4 Lenses > Crutch Tip.jpg
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Crutch Tip.jpg
19-OCT-2004

Crutch Tip.jpg

Turn lens over. Using a 1-1/2 inch rubber crutch tip pressed into trim ring while holding firmly, turn ring counter clockwise to loosen. Remove front trim ring.

Minolta DiMAGE 7
1/250s f/8.0 at 41.8mm iso100 with Flash full exif

other sizes: small medium original
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Guest 13-Mar-2007 04:30
Hi Peter,

I'm taking apart 50mm f1.4 to clean it, but i can't figure out how to take the front ring (one with spec markings on it- Minolta Maxxum 50mm etc) off. I've tried to put some electric tape on a similarly sized round object and unscrew it using the friction provided by electric tape - it didn't work (i've put quite a bit of pressure and force to ensure proper friction force). I've tried to use rubber gloves and rotate it with my fingers - didn't work.

Any ideas on what else can i try? The rim is on this lens is smaller (e.i. the lens/glass is larger, with thinner metal ring), and i'm afraid i'm not doing something right or the ring is seriously stuck.

Johnyp from Dyxum
Guest 24-Feb-2007 01:37
Didn't have either a crutch tip or cold spray, so I shoved a roll of electrical tape (1.5" diameter, tape is almost over) into it and loosened it.
Arto Rantala 02-Aug-2006 18:45
I didn't have a crutch tip so I sprayed the trim ring edge (avoiding the glass) with cold spray and it came off with almost zero force.