Jump to content

Altair 4nm DualBand CERTIFIED CMOS filters - with test certificate


Recommended Posts

  • ALTAIR

Hi there, Altair 4nm Dual Band CERTIFIED CMOS filters are in stock, and shipping now.

 

Each filter comes with an individual spectrographic test report. Just like our telescopes with optical test reports.

OD blocking, bandwidth and transmission are ideal for "extreme" light pollution, full moon, and imaging in summertime.

Optimized for F4.8 or slower. For example, they're ideal for an F6.0 refractor with 0.8x reducer, or anything slower. 

 

image.png.48c84fb28a87f21d91427c5e1bcc0c22.png

  • Like 1
Link to comment
Share on other sites

  • nickaltair changed the title to Altair 4nm DualBand CERTIFIED CMOS filters - with test certificate
  • 2 months later...

How much detail does the certificate provide ?  If it covers the full range from 400 to 700 nm, that won't give much confience in the accuracy around the centre wavelength because 3 nm is just 1% of the range)  If the test report also showed a second graph zoomed in around the centre wavelength, say +/- 25 nm, that would provide a lot more confidence in the filter performance.  As an engineer, I'd be happy to buy this product rather than a competitors if its test report can demonstrate that its performance matches the design intent.

Dave Cundy, Bristol

Link to comment
Share on other sites

  • ALTAIR
On 9/26/2022 at 5:38 PM, BucketDave said:

How much detail does the certificate provide ?  If it covers the full range from 400 to 700 nm, that won't give much confience in the accuracy around the centre wavelength because 3 nm is just 1% of the range)  If the test report also showed a second graph zoomed in around the centre wavelength, say +/- 25 nm, that would provide a lot more confidence in the filter performance.  As an engineer, I'd be happy to buy this product rather than a competitors if its test report can demonstrate that its performance matches the design intent.

Dave Cundy, Bristol

 

Hi Dave, well we printed these out across the full range which is the convention, but if you like, when you order, you can request a report showing 25nm data for each peak for your filter at .5nm res. We'll charge £25 for the extra work. I'm sure you'll like this filter. The performance is excellent according to customer feedback so far. You can ask real world owners about this filter in the Altair Facebook group here too.

  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...