6 replies to this topic

[thecelloronin]

In times of excess, I accrued a small collection of 1.25” filters with the idea of using them with smaller refractors like my finderscope. With the exception of the Veil, I haven’t found myself actually bothering to use these filters much, preferring to let my 2” filter wheel on the main objective do most of the work.

Who among you finds utility in filtering your finder, and why?

[Sebastian_Sajaroff]

None, except for the solar Mylar filter in the front of the finder scope, prevents you from grilling your eye when you want to point the Sun.

[rgk901]

using tha same at50.. used oiii on dumbbell/veil/orion have yet to try others..

veil only seen from darksite B3 to 5

but dumbbell was detected from B8-9 and Orion looks pretty darn good with 5mm EP at 1mm exit pupil (50x) from home.. sometimes with a 1.5 Barlow .. definitely my favorite

Edited by rgk901, 23 April 2024 - 01:30 PM.

[Jon Isaacs]

I have used O-III and H-Beta filters in my 50 mm RACI finder scopes to locate and navigate objects like Thor's Helmet, the California, the Veil, the North American.  When viewing large objects like the North American in a large scope, the finder helps me identify just what part of the nebula I am looking at.

 

I don't do it often as it means removing the eyepiece and then refocusing and realigning things.. 

 

A filter covering the objective is quicker.

 

Jon

[scott_larry_d]

Yes I do find filters on my finder useful.

 

I have 2" filters which I use on 2" eyepieces for wide FOV and in a 1.25"/2" adapter so I can use different 1.25" eyepieces for higher power when I'm looking for planetary nebulae. My finder accepts 2" eyepieces so I can take my widefield eyepiece out of the main scope and plop it into the finder for a wider FOV. I can look at the whole California Nebula in the finder, with H-beta filter, and then take that eyepiece and filter straight into the main scope for close up views. Same for the Veil Nebula with an OIII and I've gotten some great feedback from people who have never seen the entire Veil in one FOV. 

 

Full disclosure, my finder is a 60mm Borg ED with Baader amici, normally configured with a 27mm Panoptic for 13x and 5* FOV. 

 

Hope this is helpful, cheers!

[Keith Rivich]

I have used O-III and H-Beta filters in my 50 mm RACI finder scopes to locate and navigate objects like Thor's Helmet, the California, the Veil, the North American.  When viewing large objects like the North American in a large scope, the finder helps me identify just what part of the nebula I am looking at.

 

I don't do it often as it means removing the eyepiece and then refocusing and realigning things.. 

 

A filter covering the objective is quicker.

 

Jon

Ditto...

[GeneT]

None. Not necessary.