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Optivisors - question for users
nheather
_VISITCOMMUNITY
United Kingdom
Joined: November 12, 2007
KitMaker: 295 posts
AeroScale: 0 posts
Posted: Saturday, November 23, 2019 - 11:41 PM UTC
I have a pair of DA-5 OptiVisor which Donegan claim to have a magnification of 2.5x - the diopter equation makes it x2.25 but Uím not going to quibble as it is what it is and it works for me. It is the best compromise of magnification and focal distance - any higher than the model becomes too close to work on comfortably .

But here is my problem, if I look down at the workbench it is a blur. If I lift the visor it is still a blur because my eyesight has decayed with age. To look at the workbench, I need 1.5x reading glasses (which from the equation I make as diopter = 2.

To put my glasses on every time I lift the visor is a bit of a faff, so I tried wearing the spectacles underneath the OptiVisor.

Now when I lift the visor it is perfect, but with the visor down there is a problem, the magnification has increased and the model needs to be held much closer to focus.

If my understanding of the maths, it is because I now effectively have 2 + 5 = 7 diopter - equivalent of an Optivisor DA-7.

Iím thinking that if I got a DA-3 plate then with the glasses and the visor it would be like having my DA-5. But I donít entirely trust my logic. Ideally, I would go to a store and try different OptiVisors with my reading glasses but there is nowhere that I can do this.

Wondering whether anyone here has been through the same process.

Cheers,

Nigel
CMOT
Staff MemberEditor-in-Chief
ARMORAMA
_VISITCOMMUNITY
England - South West, United Kingdom
Joined: May 14, 2006
KitMaker: 10,944 posts
AeroScale: 290 posts
Posted: Monday, November 25, 2019 - 01:34 AM UTC
No idea but I would love t o see an answer as I have the same issue at times
RobinNilsson
Staff MemberTOS Moderator
KITMAKER NETWORK
_VISITCOMMUNITY
Stockholm, Sweden
Joined: November 29, 2006
KitMaker: 6,571 posts
AeroScale: 21 posts
Posted: Monday, November 25, 2019 - 06:19 AM UTC
I wear reading spectacles under the optivisor, when I flip up the front I look through the spectacles and get a suitable focus distance.
My optivisor has two magnifications, one fixed and another by a fold down lens inside the hood.
Reading spectacles (+2.0) together with the optivisor gives me what I need. I also have a set of other reading spectacles with higher values so for detail work I can switch to +4.0 if needed (where short focus range though ...)
/ Robin
Scarred
_VISITCOMMUNITY
Washington, United States
Joined: March 11, 2016
KitMaker: 1,741 posts
AeroScale: 27 posts
Posted: Monday, November 25, 2019 - 01:16 PM UTC
Sometimes I forget to put my reading glasses on or even my reading glasses and have my face about 6 inches from my work. It's been the cause of some humor in the past when I've super glued things to my face or ear. And I have two perfectly fine visors at hand.