Re: [APML]: 300mm F2.8 lenses..which brand?

["Philip Perkins" <philip@astrocruise.com>]

The Astro-Photography Mailing List
------------------------------------

> My 400mm f/4 Tamron also exhibited some slop. It turned out to be loose
> screws near where the tripod collar mates to the lens. I tigtened them and
> have had no problems since. It might be worth checking if that's all it is
> on yours.

Hi Wil,  this was slop within the Adaptall itself.  I had three - two used 
ones and one new one and they all had it. Take the lens in one hand and the 
camera body in the other an wiggle / jiggle them about and the slop becomes 
apparent. It's integral to the Adaptall piece itself.

It's true that there is sometimes also some slop in the native Nikon mount 
system but this can be completely overcome by using tape to add padding 
around the lens port on the camera body, wheras no means of eliminating the 
Adaptall slop came readily to mind.

Regards
--Philip

Philip Perkins  --  philip@astrocruise.com
51 27'N 1 36'W  --  Wiltshire, UK
43 54'N 5 32'E  --  Luberon, France
Astrocruise     --  http://www.astrocruise.com