Methods for Testing Optics?

Ray B

AH legend
Joined
Aug 19, 2016
Messages
2,721
Reaction score
3,230
Location
WA St, USA
Media
77
Hunting reports
USA/Canada
1
I read comments that one brand of scope is better than another and so on. I have several brands of scopes from a vast timespan of years and I am wondering how I can make a comparison test of them. My brother in law, a retired airplane engineer gave a chart to me that has several lines and gaps on it varying in size from wide to quite thin. The idea is to look through the scope and see how fine a line can be discerned and if the lines change direction from vertical & horizontal to curved either making a concave or convex pattern. This is done in bright light and in gradual steps into very dark. The problem is putting the scope in a fixed ;position, then trying to look through it and record the image. After a little looking, my eyes find it difficult to tell what I'm looking at. I've tried taking photographs with a DSLR with some success, but it adds variable where the camera may be making one scope appear better than another.

Has anyone done any investigating along this line? If so, I would really like to hear about a workable method so as not to re-invent a process.
 

BRICKBURN

Super moderator
Contributor
Lifetime titanium benefactor
AH ambassador
Joined
Aug 5, 2010
Messages
22,894
Reaction score
17,165
Location
Canada
Media
412
Articles
23
Hunting reports
Africa
8
USA/Canada
2
Europe
1
Hunted
Namibia, South Africa, Botswana, Mozambique, Canada, USA, Mexico, England
I have never gone so far as to test for lens aberrations with the pattern as you brother in law has provided.
I was more concerned with light transmission in low light conditions and I used a semi dark room comparable to twilight and determined which made it possible to read a set text more clearly.
All totally subjective, but it's my eyes that have to look through the scope or binoculars.
 

Forum statistics

Threads
36,664
Messages
694,725
Members
64,264
Latest member
JaninaBrow
 

 

 

Latest profile posts

Rifle57 wrote on Rimshot's profile.
I bought some bullets from Rimshot and he is good to trade with!
Greetings all! I've been a hunter for 50 years, but only now planning a trip to Africa. I was fortunate and successfully bid on a couple hunts for plains game in SA later this year and next. Also a rare Native Texas (5th generation) and USMC Vet. Hunt safe y'all!
uujm wrote on trg's profile.
I am looking for a Safari Express. Was yours made in New Haven or South Carolina? Any other details you can give me? I am very motivated to buy.
pimes wrote on flatwater bill's profile.
Hello Bill - can you tell me that landowner/ranch/outfitter - Thank you!
Pete0905 wrote on damundsen87's profile.
Hello
Is the Khales 1-6 still for sale?
Thanks
Josh
 
Top