· Get a Cloudy Nights T-Shirt · Submit a Review / Article Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu… uh, User You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> Refractors Previous   Index   Next   Threaded   Pages: 1 dsv member Reged: 12/01/07 Explore Scientific AR152 Collimation Question       #5272699 - 06/15/12 11:34 AM Edit   Reply   Quote Quick Reply   I'm am having difficulty getting an answer regarding the collimation screws on the AR152. Are the two (X3) screws on the front of the objective those for collimation OR the screws seen atop the objective? I (think) the top would be for "centering" as opposed to collimation. Which is which? Post Extras:       ken svp120 Carpal Tunnel Reged: 12/19/04 Loc: Ohio Re: Explore Scientific AR152 Collimation Question [Re: dsv]       #5272894 - 06/15/12 01:44 PM Edit   Reply   Quote Quick Reply   Who did you purchase the scope from? And have you tried contacting them or Explore Scientific directly? Post Extras:       dsv member Reged: 12/01/07 Re: Explore Scientific AR152 Collimation Question [Re: ken svp120]       #5272912 - 06/15/12 02:07 PM Attachment (31 downloads) Edit   Reply   Quote Quick Reply   Yes, I contacted both ES and Bresser...odd they don't really clarify, if fact, they provide NO operator's manual for the AR series...only the ED units. The achromat (AR series) does not really requir [image]https://mail-attachment.googleusercontent.com/attachment/?ui=2&ik=faa5ecd8dc&view=att&th=137f07ee4e811d0a&attid=0.1&disp=inline&safe=1&zw&saduie=AG9B_P-psvva4cb-Lf1GnSFhfxJw&sadet=1339783461555&sads=eZmqA3ZztXmdcqwNS9F8nn39KdM[/image] e "centering", but does sometimes require "collimating"...why I can't get a straight answer from them is puzzling. I include a photo of both sets of objective adjusting screws. What do you think? Thanks! Post Extras:       Darenwh Carpal Tunnel Reged: 05/11/06 Loc: Covington, GA Re: Explore Scientific AR152 Collimation Question [Re: dsv]       #5272924 - 06/15/12 02:15 PM Edit   Reply   Quote Quick Reply   Unless I am mistaken they are push/pull sets. You loosen one then tighten the other. In the picture above the ones that are sticking out would be the push and the ones that are flush would pull. Make any changes very carefully using only one set of push pull screws at a time and only turning a fraction of a turn at a time. Here is a web page that may be of help. Edited by Darenwh (06/15/12 02:16 PM) Post Extras:       dsv member Reged: 12/01/07 Re: Explore Scientific AR152 Collimation Question [Re: Darenwh]       #5272933 - 06/15/12 02:18 PM Attachment (35 downloads) Edit   Reply   Quote Quick Reply   Thanks! Just to be sure, here is a better photo of the two various adjustment ports. For collimation, I assume that I would use only the front-mounted push/pull screws? Are the top adjustors, then for objective "centering"? Post Extras:       Refractor6 Post Laureate Reged: 10/20/04 Loc: Vancouver B.C. , Canada Re: Explore Scientific AR152 Collimation Question [Re: dsv]       #5272939 - 06/15/12 02:22 PM Edit   Reply   Quote Quick Reply   One's to lock and the other one is to adjust collimation {the tuner} when the "lock" screw has been backed off slightly to allow lens movement. Then you tighten the "lock" back down when you're done. Mr Bill and Galaxyman {Karl} have lots of firsthand experience with these cells for tweeking the collimation....ask them for help. I have the same arrangement on my 152 f/8 cell but its not needed any adjusting since 2005...so far Oh and I agree the makers of these different variations of this scope provide very little info for the buyers with problems down the road Post Extras:       Refractor6 Post Laureate Reged: 10/20/04 Loc: Vancouver B.C. , Canada Re: Explore Scientific AR152 Collimation Question [Re: Refractor6]       #5272948 - 06/15/12 02:25 PM Edit   Reply   Quote Quick Reply   Leave the side centering screws alone for now unless you know what you're going to do by moving them {changing their position and tension on the glass} is my advice. Post Extras:       John59 sage Reged: 11/06/11 Loc: Round Rock,TX Re: Explore Scientific AR152 Collimation Question [Re: Refractor6]       #5272969 - 06/15/12 02:34 PM Edit   Reply   Quote Quick Reply   Good information to have. I have had mine for less than 6 months now. How did you remove the dew shield? I tried but was afraid to apply too much force not knowing exactly how it is held in place. Post Extras:       dsv member Reged: 12/01/07 Re: Explore Scientific AR152 Collimation Question [Re: John59]       #5272983 - 06/15/12 02:39 PM Edit   Reply   Quote Quick Reply   Hi John, yes after examining the dew shield closely, I applied a simple yet sturdy pull grip to the dew shield and it IS a friction mount....the shield is in place by friction of felt pads located on the objective cell. Not to worry, you just need to give the shield a good steady "pull" off. You may have to "distribute" some pull as you go. Post Extras:       John59 sage Reged: 11/06/11 Loc: Round Rock,TX Re: Explore Scientific AR152 Collimation Question [Re: dsv]       #5272988 - 06/15/12 02:41 PM Edit   Reply   Quote Quick Reply   Thanks dsv! It'll make cleaning the objective much easier! 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