Coincidentally parfocal.
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- Posts: 3329
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- Location: Winnipeg, Manitoba, Canada
Coincidentally parfocal.
My current turret has 10, 20, 40, and 60x. I mostly switch between 10x and 60x. Lo and behold, i find those two objectives essentially parfocal. The others are out by several turns.
Re: Coincidentally parfocal.
Hi,
Every objective has a means of adjusting lying underneath the sleeve, there will be a small locking nut that you can adjust to parfocality.
Another method is the use of shims to lower the objective in the turret.(they are available in 001" and upwards.
Its a matter of trial and error.
Every objective has a means of adjusting lying underneath the sleeve, there will be a small locking nut that you can adjust to parfocality.
Another method is the use of shims to lower the objective in the turret.(they are available in 001" and upwards.
Its a matter of trial and error.
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- Posts: 1186
- Joined: Tue Oct 20, 2020 6:44 am
Re: Coincidentally parfocal.
I have an infinity scope Amscope t420. I placed a 20x finite objective between 10 and 40x. It not only focussed but was parfocal. I went out and bought a lottery ticket. How did I get that lucky? You never know completely what to expect.
Greg
Greg
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- Posts: 3329
- Joined: Sun Mar 22, 2020 10:06 am
- Location: Winnipeg, Manitoba, Canada