I don't get the 8400 out very often these days as the light levels
are low at this time of year so I need the speed of the G1 and GF1 (
I've been running them at iso 800 ).
I thought I would use it on the zoom eyepiece as in the garden where
I digiscope. The range is 6-9 meters and I need to be able to zoom
in and out with the change in size of birds from warblers to thrushes.
I needed to use the Swarovski UCA adapter to keep the camera lens as
close to the eyepiece as necessary to minimise the vignetting ( I had
to back it off a bit to eliminate shadowing ). The attached
composite photo shows the vignetting at 25x and it disappearing at
40x at the "sweet spot" of 37 mm.
I appreciate the wider FOV of the new eyepiece and it gives new life to the reliable 8400. At 40x and 37 mm with no vignetting you are getting 1480 mm and at 50x 1850 mm in the "sweet spot" ( end of Green Macro zone)
Neil
Nikon 8400 and Sw STS80HD scope and Sw 25-50zoom and UCA adapter and Telescope Rail
Hong Kong,
China.
Jan 2010
are low at this time of year so I need the speed of the G1 and GF1 (
I've been running them at iso 800 ).
I thought I would use it on the zoom eyepiece as in the garden where
I digiscope. The range is 6-9 meters and I need to be able to zoom
in and out with the change in size of birds from warblers to thrushes.
I needed to use the Swarovski UCA adapter to keep the camera lens as
close to the eyepiece as necessary to minimise the vignetting ( I had
to back it off a bit to eliminate shadowing ). The attached
composite photo shows the vignetting at 25x and it disappearing at
40x at the "sweet spot" of 37 mm.
I appreciate the wider FOV of the new eyepiece and it gives new life to the reliable 8400. At 40x and 37 mm with no vignetting you are getting 1480 mm and at 50x 1850 mm in the "sweet spot" ( end of Green Macro zone)
Neil
Nikon 8400 and Sw STS80HD scope and Sw 25-50zoom and UCA adapter and Telescope Rail
Hong Kong,
China.
Jan 2010
