View Single Post
  #39  
Old 02-07-2019, 01:17 PM
PRejto's Avatar
PRejto (Peter)
Registered User

PRejto is offline
 
Join Date: Jan 2011
Location: Rylstone, NSW, Australia
Posts: 1,397
The issue is probably short wavelength blue which is a bit out of focus compared to the "blue" focus point. Astronomik specifically designed their Deep Sky blue filter to deal with this issue. Compare the 2 different types of spectrums between the older Type 2 and Deep Sky sets. On my TEC140 the Deep Sky set clearly improved blue bloat.
Attached Thumbnails
Click for full-size image (Deep-SkyRGB.png)
60.6 KB24 views
Click for full-size image (astronomik-lrgb-typ2c_trans.png)
91.2 KB24 views
Reply With Quote