I got 1st sample of SJ DBP EX.
Red line is a new EX version
Features are;
- Higher transmission
- Flat top
- Steep cutoff lines
- Clean bottom cuts
- Fused Quartz – excellent purity and transmission
- SJ-proprietary premium coating – virtually halo-free
I had the chance for the halo test just before the marine layer came in last night. Sigma 105mm is like 3.5″ scope at F2.2 speed.
Unfortunately California’s June gloom season came in again. This will be commercially available middle of this month.
My new blog : https://tedastro.wordpress.com/
Looks interesting! How does this filter compare to the NBZ?
It should be quite similar or slightly better contrast because of the clean cutoff lines. But I will test and see more anyway.