SIGH. Aligning optical assembly today and huh weird, red beam isn't passing the UV dichroic beamsplitter. Oh right that's because it's actually a UV bandpass filter 🤦 - ThreadSky

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breakingtaps.com • 37 days ago

SIGH. Aligning optical assembly today and huh weird, red beam isn't passing the UV dichroic beamsplitter.

Oh right that's because it's actually a UV bandpass filter 🤦

Comments

thegrandblooms.bsky.social•37 days ago

Was it a ZWB2? I have been looking for uv bandpass filters for uv photography that doesn't have the ir leakage but the baader-u seems unusually pricy, curious if you know of any alternatives

breakingtaps.com•37 days ago

Was actually something I got from aliexpress a year or two ago. Specs are a bit of a mystery and it wasn't well labeled, which is why I forgot it was a bandpass.

Anecdotally it seems pretty good but haven't tested rigorously

https://www.aliexpress.us/item/3256803513900139.html

thegrandblooms.bsky.social•37 days ago

Good to know, thanks for the lead!

breakingtaps.com•37 days ago

Scrounged around optical parts box and found this little guy. Not ideal but should work for now 🫤