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The ProPlanet IR 742 only allows infrared light with wavelengths of more than 742 nm to pass. In this wavelength range the effects of seeing are significantly lower than in the visible spectrum of the human eye. This allows much sharper images than are usually obtained from your device and location. Another advantage is that the sky background of advanced dawn is dark and so the filter even allows photography of the planets and the moon at daylight. BP is short for Bandpass.
The Astronomik ProPlanet IR 742 cuts off the visible part of the spectrum and allows the light of wavelengths longer then 742nm to pass. Due to this behavior the part of the spectrum that is most sensitive to bad seeing is rejected. This approach has a big improvement on the imaging of planets and the moon. The image is more steady than the image in the visible light with nearly identical exposure times.
Jupiter, imaged with L-RGB Filter (left) and Astronomik ProPlanet 742 (right)
Comparing sharpness in IR-R-G-B at Saturn
Comparing L-RGB versus IR-RGB at Saturn
When the seeing is very bad and the instrument is 10" (250 mm) or larger, the Astronomik ProPlanet IR 807 may be the better choice.
more information about the photographic Astronomik filters
1.25" (M28.5)
2" (M48)
T-thread Cell (M42x0.75)
SC-Cell (2" / 24TPI)
Ø27mm
Ø31mm
Ø36mm
Ø42mm
Ø50mm
50x50mm
EOS APS-C Clip-Filter
EOS XL Clip-Filter
Sony Alpha Clip-Filter
Nikon XL Clip-Filter
Pentax K Clip-Filter
M52
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
Items that have been opened, damaged or are otherwise unsaleable will be subject to a minimum 10% restocking fee, to be assessed by Telescopes Canada upon receipt of the returned goods
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
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