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Old Wednesday 17th May 2017, 20:11   #1
wolfbirder
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Help with Diopter ring on RSPB HD 8x42

I have just purchased a wonderful binocular on Ebay for £200, when new they cost £500, so I can't really complain if there is a fault.

Optically superb, but I just cannot shift the Diopter ring to make them perfect for me. The dioptre setting is stuck on the middle setting but I can't turn the dial right or left to + or - settings.

I daren't force it but have tried to move it without success. I don't want to use excessive force as it might damage them optically.

Is there a secret way I am missing to move the dioptre ring? I know on some more expensive models (Leica for example) you have to lift the ring towards you and then lock it back down, but that is not the case with this binocular.

I seriously love this binocular, I've been birding since 1998 but these are by far the best I have had, optically.

Any advice would be gratefully received.
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Old Friday 19th May 2017, 09:16   #2
jring
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Hi,

you certainly should complain if this doesn't turn out to be a case of RTFM - unless the seller mentioned the stuck diopter and sold the pair as damaged.

Joachim
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Old Friday 19th May 2017, 10:10   #3
wolfbirder
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it's difficult, advertised as mint but only £200 when normal price is at least twice that, so I am not complaining about that they are superb.

Fortunately I think the diopter setting it is stuck on is ok for my eyes, but I'd like to try a different setting .

Just wondered if anyone else had experienced a stiff diopter.
No comments please(:-
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Last edited by wolfbirder : Friday 19th May 2017 at 14:51.
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Old Friday 19th May 2017, 17:36   #4
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There are a couple of forum regulars that help out with RSPB optics and I was hoping they might respond. Failing that I'd give Viking a call. They source the binoculars for the RSPB and I'm fairly sure take care of service and repairs.
http://www.vikingoptical.co.uk/service-support/

Good luck

David
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Old Saturday 20th May 2017, 05:50   #5
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Originally Posted by wolfbirder View Post
I have just purchased a wonderful binocular on Ebay for £200, when new they cost £500, so I can't really complain if there is a fault.

Optically superb, but I just cannot shift the Diopter ring to make them perfect for me. The dioptre setting is stuck on the middle setting but I can't turn the dial right or left to + or - settings.

I daren't force it but have tried to move it without success. I don't want to use excessive force as it might damage them optically.

Is there a secret way I am missing to move the dioptre ring? I know on some more expensive models (Leica for example) you have to lift the ring towards you and then lock it back down, but that is not the case with this binocular.

I seriously love this binocular, I've been birding since 1998 but these are by far the best I have had, optically.

Any advice would be gratefully received.
Give us some photos, I think I may know your problem.

Bill
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Old Sunday 21st May 2017, 12:44   #6
wolfbirder
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Thanks very much Dave and Bill, I have rung Viking and they suggested dropping them in, which I may do in July.

Here's a photo Bill..............eyelid in twisted up position, not that that has any bearing on the issue. The + sign is just round the corner on the right hand side of the barrel.
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Old Monday 22nd May 2017, 16:11   #7
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Originally Posted by wolfbirder View Post
Thanks very much Dave and Bill, I have rung Viking and they suggested dropping them in, which I may do in July.

Here's a photo Bill..............eyelid in twisted up position, not that that has any bearing on the issue. The + sign is just round the corner on the right hand side of the barrel.
Sorry; I thought I might be able to help. Some people with similar problems don’t know that on some binos the central focus wheel must be pulled out to be activated. That does not appear to be the issue here.

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Last edited by WJC : Monday 22nd May 2017 at 20:38.
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Old Tuesday 23rd May 2017, 13:28   #8
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Before sending them off, you might consider warming the ring a bit with a hairdryer. Not to excessive temps like you could get with a heatgun of course, but similar to what they would experience when left inside a closed-up auto during the summer. Modern binos will easily withstand this level of warmth. It's worth a try, and won't cost you anything. If there is any dried lube inside the ring causing it to freeze up, it might soften it a bit......

Last edited by PhilR. : Tuesday 23rd May 2017 at 15:58.
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Old Tuesday 23rd May 2017, 15:05   #9
richard866945
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Being new and water proof may just mean that the ring is very tight. I have experienced this on quite a few new binoculars and understand your reluctance to force it. If you can get to Viking, you may find it only takes a few seconds to release it.
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Old Tuesday 23rd May 2017, 16:15   #10
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I have one binocular (a Zen-Ray) that you have to pull the diopter ring up about 1 mm, set the diopter, then push back down to lock it.
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Old Wednesday 24th May 2017, 07:10   #11
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Thanks so much for your thoughts all, I appreciate you going to the trouble. I will give it the hair drier treatment once I return from holiday on 3 June , I'll report back.

It's not the type where you have to lift it up to lock or unlock.

Thanks again.
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Old Monday 5th June 2017, 18:45   #12
wolfbirder
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Just to update, I did try the hair drier treatment, but to no avail. Its still stuck.
Nice idea by the way, I can certainly see the logic.

Think I'll just stick with it as it is, as the position its stuck in seems perfect for my eyes, rather fortuitously.
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Old Friday 14th July 2017, 21:42   #13
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Hairdryers eh. £200 well spent. You do sometimes get what you pay for!
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Old Sunday 17th September 2017, 21:20   #14
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Originally Posted by wolfbirder View Post
Just to update, I did try the hair drier treatment, but to no avail. Its still stuck.
Nice idea by the way, I can certainly see the logic.

Think I'll just stick with it as it is, as the position its stuck in seems perfect for my eyes, rather fortuitously.
Why not pop into your local rspb shop , they will advise you if you are doing something wrong, the bin is could be covered by the guarantee
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