Black Night Binoviewers

Siebert Optics
200 Short Johnson Road
Clayton, NC 27520
919-553-3980
hs3980@nc.rr.com
www.SiebertOptics.com

IMPORTANT:  PLEASE READ ALL INSTRUCTIONS BEFORE TOUCHING/USING THE BINOVIEWERS.  

Thank you for your purchase.  If you feel inclined please leave positive feedback on my website in my guestbook on the Black Night Binoviewer Page.   Please be specific about what you like about them for others can benefit from your positive observations. If you have any problems please let me know so that I can address any concerns you may have.  

If you are not already familiar with binoviewers there is a few things you really need to know.  When you bought your first telescope it took some getting use to learning how to line it up, focus it and track down obscure objects.  This took patience and thought.  You may find that binoviewers take a little getting use to. Now you have to coordinate two eye viewing rather than one. The rule of thumb is to do exactly what you do with a pair of binoculars.  Eyepiece spacing is critical and remember better to have the eyepieces a little to close then too far away. This means that the eye spacing must be adjusted carefully. Also each eye does not focus perfectly the same so focus is very important too. If one image is out of focus the image will look out of alignment so a lot of little things have got to come together to make the images merge well. Using your focuser you focus your binos.  If both images focus and are sharp together then you are done.  But if one is focused and the other is not, your vision may be slightly different in one eye than the other.  If this is the case focus until one eye is sharp.  The rule of thumb is move your focus in until one of your eyepieces is sharp.  Then focus the other eyepiece out slightly.  The holder is designed with twist compression which allows you to set your eyepieces where you want and then twist to lock them down.  Do not use excessive pressure since it is not necessary. See DIOPTER INSTRUCTIONS online

 If it is necessary I have marked some eyepieces with alignment marks on top of the eyepiece. The reason for this is many eyepieces sold today do not have perfect optical centers. If you rotate the eyepiece the optical centers can change and make merging more difficult. To correct this I have marked the eyepieces with a white dot. After focusing your eyepieces simply rotate the dots to the center facing one another and your optical centers for the eyepieces will then match perfectly.    

Feel free to ask me any questions you may have.  I will be glad to help you any way I can.   If you would like your questions answered by your peers about binoviewing and eyepieces in general there are forums to go to. Here is one.  The “Cloudynights” forum. Cut and paste the link.
  
 http://www.cloudynights.com/ubbthreads/postlist.php/Cat/0/Board/binoviewers  

Clean your binoviewers as little as possible.  A little dust and particles have little impact on viewing performance in the device itself.  But if you have to clean them turn them upside down and remove the particles with a Q-tip.  DO NOT BLOW INTO THE BINOS TO REMOVE DUST OR PARTICLES THAT MAY HAVE FALLEN INTO THE BINOS.

PLEASE NOTE:  Like with any high quality, optical equipment DO NOT leave in direct sunlight and do not store in places where the temperatures can reach over 130 degs.

BINOVIEWER EYEPIECES:

For the best collimation of of eyepieces please put the white dots closest to each other (3 o'clock left and 9 o'clock right

Any problems achieving merge please do not hesitate to call or email me at harrysiebert@nc.rr.com and I will help you.   Most people do not have problems merging, but some may need help setting things up properly.

See OCA instructions online in the ad. Call or email with questions.