I didn't notice 2x converters and extension tubes which include helical focusing; which brands and types must we find. In contrast, typical 135 mm telephotos permit around 12 mm of focus adjustment.

Bob


At 20:20 15.01.03 +0800, you wrote:

Or sometimes el-cheapo 2x converters, or extension tubes...
these are also found cheaply.

At 11:24 15-01-03 +0100, you wrote:
>This is possibly a help but I admit problems!   I just returned from London
>and Jessops Classic was offering old (low grade) 35 mm lenses for one pound
>each.  Your cost would be almost all postage.  Some member of this group
>might buy  a bunch and ship them to anyone needing one.  ( I didn't buy
>many because of overweight baggage problems.)   Of course, the mounts would
>be most useful for smaller lenses.
>
>At 17:47 14.01.03 -0500, you wrote:
>>Hi Folks,
>>
>>Does anyone know a source of cheap helical focus mounts?  Can I make one
>>out of PVC pipe fittings or something similar?
>>
>>Thanks,
>>Dai.
>>
>
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