For those not on the DSLR Modification Yahoo Group, some geezer has made a Canon T-Mount adaptor (http://tech.groups.yahoo.com/group/DSLRmodifications/message/6157) which gets rid of the slop in the standard ones for $40. www.wa-chur-ed.com (http://www.wa-chur-ed.com) has details.
Thats a lot of money for not a lot, all he has done is add 3 tapped holes and swap the grub screws for a thumb screw on a standard adaptor.
So thats about £20 for 15 mins work on a mill, 3 grub screws and a thumb screw.... :o
I never said it was worth it. I use a bungee cord to tension the camera to t-mount interface to prevent movement. Works for nowt!
The idea is a good one and the price isn't that bad if your only tools are a hammer, screwdriver and bottle opener :D
Still prefer Duncans bungee though ;)
If it works then for sure it's a good idea, my adaptor has loads of slop in it.
Looking at what he has done though it's not exactly the obvious solution and could be done in a far simpler fashion.
What slop are we talking about here?
I've never had slop in a T-mount adaptor so I don't really understand the problem this apparently solves.
Quote from: MarkS on Apr 23, 2013, 22:18:37
What slop are we talking about here?
I've never had slop in a T-mount adaptor so I don't really understand the problem this apparently solves.
Where the T-mount clips on to the camera, it has a tendency to 'wobble' a little.
Quote from: JonH
Where the T-mount clips on to the camera, it has a tendency to 'wobble' a little.
I see. You're saying there's often slack to allow the camera body to "rock" slightly against the T-ring. Luckily I've never had that happen.
QuoteWhat slop are we talking about here?
I've never had slop in a T-mount adaptor so I don't really understand the problem this apparently solves.
ditto, I have never had a problem either.
Carole
Quote from: MarkS on Apr 23, 2013, 22:18:37
What slop are we talking about here?
I've never had slop in a T-mount adaptor so I don't really understand the problem this apparently solves.
It the way the little pin doesn't engage snugly so the camera can rotate a few pixels relative to the OTA and also the flanges don't hold the camera very tightly so there is a little lateral play. I have two adaptors, one Japanese, one Chinese and the both exhibit these traits to differing degrees. If the camera body moves during an exposure it will show.