Join for FREE
It only takes a minute!
Zeiss - Always on the lookout for something special – Shop now

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Cleaning scope advice

Thread Tools Rate Thread
Old Monday 8th April 2019, 20:05   #1
Registered User

Join Date: Aug 2016
Location: England
Posts: 40
Cleaning scope advice

Hi all,

I have noticed that at certain mags I can see a small spec in the eyepiece showing up in the image.

I think it might just be some dust between eyepiece and scope - is the best way to clean it just to unscrew, blower and if needed a zeiss wipe?

I don't want to do it unless I'm going to get it right, so any advice on this one?

hr21 is offline  
Reply With Quote
Old Monday 8th April 2019, 21:32   #2
Registered User

Join Date: Nov 2016
Location: Germany - Hessen
Posts: 71
If you see the 'particles' only and always at same focal lenght, it could be inside the zoom ocular. In my Zeiss DiaScope I can see some tiny black 'things' at the same place in the field, but only at 20x, they vanish at 23x and came never back until 75x. Perhaps there is dust or other particles on the glass just behind the prism housing, try to blow it away with a mechanical pump from the photoservice, but do not use 'air in a can'. Sharp seen speckles must sit near the focal plane, if so contact the service.
Try to screw out the eyepiece (if it's an opticron), let the things stay sharp - if they turn if you turn slowly the eyepiece, they are in (or at) the eyepiece (the field lens).
bioscope is offline  
Reply With Quote

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

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cleaning Advice bluesinlondon Binoculars 10 Thursday 15th July 2010 14:52
Advice needed on 40D sensor cleaning Mike Shurmer Canon 13 Saturday 11th April 2009 09:41
Sensor cleaning advice please Cashie Canon 48 Friday 6th July 2007 22:26
Cleaning optics advice please RJL2005 Spotting Scopes & tripod/heads 8 Friday 16th June 2006 13:24
Cleaning advice swalker Binoculars 12 Tuesday 26th July 2005 21:04


Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.20322394 seconds with 16 queries
All times are GMT. The time now is 10:49.