#1  
Old 29-11-2012, 03:16 PM
Merlin66's Avatar
Merlin66 (Ken)
Registered User

Merlin66 is offline
 
Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
Spectro testing the front Canon filter

Since publishing some tranmission graphs last year which clearly show that the front filter ( the one usually left behind when the colour balance filter is removed for the "mod") acts as a very good UV-IR cut filter, I've been beat up by the guys in the States who say an additional UV-IR "replacement" filter is the ONLY way to go......
Obviously I disagree.
I managed to set up the MG80 spectroscope this morning and test a separate front filter element ( removed from a 1000D).
Surprise, surprise it shows exactly the same...
The attached file gives details.
Feedback and comments welcome.
Attached Thumbnails
Click for full-size image (100_101_comp_small.bmp)
84.4 KB42 views
Attached Files
File Type: pdf Canon front filter test.pdf (78.1 KB, 21 views)
Reply With Quote
  #2  
Old 29-11-2012, 03:28 PM
sheeny's Avatar
sheeny (Al)
Spam Hunter

sheeny is offline
 
Join Date: Jun 2005
Location: Oberon NSW
Posts: 14,288
Looks convincing to me.

Al.
Reply With Quote
  #3  
Old 30-11-2012, 07:16 AM
Shiraz's Avatar
Shiraz (Ray)
Registered User

Shiraz is offline
 
Join Date: Apr 2010
Location: ardrossan south australia
Posts: 4,918
nice bit of work Ken. probably won't alter the opinions of those who value opinion over data.

Last edited by Shiraz; 03-12-2012 at 07:15 AM.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 04:22 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement