Details
Focal length 13mm. Good for testing telescope mirrors down to F/4.7 ($15 laser I sell) or down to F/3.7 (glass laser I sell)
This part is from surplus shed part number L13545 (or equivalent)
I won't test your specific lens but I have tested a few of these and they are excellent. They will give you better than 1/50 wave accuracy when using for a Bath Interferometer.
Mount for lens is included. Lens will arrive mounted.
Too bright!
