Nikon BD Plan 40x/0.65 tube length

anto74 · Post by **anto74** » Wed May 27, 2020 11:18 am

Hello,
the right tube length extension is 210mm or 200mm?
Thanks
Antonio

rjlittlefield · Post by **rjlittlefield** » Wed May 27, 2020 11:21 am

200 mm from shoulder of mounting threads to focused image plane.

This is a nominal "210 mm" tube, noting that the image is normally focused 10 mm below the end of the tube.

--Rik

anto74 · Post by **anto74** » Wed May 27, 2020 11:26 am

rjlittlefield wrote:200 mm from shoulder of mounting threads to focused image plane.

This is a nominal "210 mm" tube, noting that the image is normally focused 10 mm below the end of the tube.

--Rik

Thanks Rik, then I must calculate 200mm from sensor plane to rear mounting thread, right?
Thanks
Antonio

rjlittlefield · Post by **rjlittlefield** » Wed May 27, 2020 11:31 am