Brief Test.
Foton 10x40M BKFC.
Fully multicoated but not phase coated, I think.
One barrel good star images. The other barrel the star images are stretched to one side, maybe from the collimation process.
The good star image side has two largish internal blemishes, which may be balsam separation.
1996.
Trinovid 10x40 122m/1000m
Germany red dot 798xxx.
Not sure of the date.
Leitz Wetzlar red round emblem on front.
Seems to be single coated with one uncoated prism surface.
The Foton is 157mm long and has slightly wider objective tubes.
The Trinovid is 140mm long.
Surprises.
The central resolution of the Foton is clearly better for me hand held centrally compared to the Trinovid.
Two reasons. I can hold the Foton steadier and the Foton seems to be higher magnification. Say 10.5x if the Trinovid is 10.0 times.
Or maybe 10.3x compared to 9.8 times. I haven't tried to accurately measure this.
Despite this, on a bright sunny morning the Foton seems slightly brighter than the Trinovid, even if the Foton magnification is greater.
But the Trinovid needs a service. Although the Foton has the internal blemish.
The field of the Trinovid is much greater than the Foton.
If the new Retrovids had proper wide fields, i.e 7.0 degrees for the 10x40 and corresponding fields for the 8x40, 7x35 and 6x24 I would be very interested.
As it stands the Retrovids don't really interest me.
B.
Foton 10x40M BKFC.
Fully multicoated but not phase coated, I think.
One barrel good star images. The other barrel the star images are stretched to one side, maybe from the collimation process.
The good star image side has two largish internal blemishes, which may be balsam separation.
1996.
Trinovid 10x40 122m/1000m
Germany red dot 798xxx.
Not sure of the date.
Leitz Wetzlar red round emblem on front.
Seems to be single coated with one uncoated prism surface.
The Foton is 157mm long and has slightly wider objective tubes.
The Trinovid is 140mm long.
Surprises.
The central resolution of the Foton is clearly better for me hand held centrally compared to the Trinovid.
Two reasons. I can hold the Foton steadier and the Foton seems to be higher magnification. Say 10.5x if the Trinovid is 10.0 times.
Or maybe 10.3x compared to 9.8 times. I haven't tried to accurately measure this.
Despite this, on a bright sunny morning the Foton seems slightly brighter than the Trinovid, even if the Foton magnification is greater.
But the Trinovid needs a service. Although the Foton has the internal blemish.
The field of the Trinovid is much greater than the Foton.
If the new Retrovids had proper wide fields, i.e 7.0 degrees for the 10x40 and corresponding fields for the 8x40, 7x35 and 6x24 I would be very interested.
As it stands the Retrovids don't really interest me.
B.