... No and yes. The surface quality, figure accuracy, and coating quality are the same as on the other Celestron SCTs so to that extent they are optically...
Quote "It's largest apparent defect is astigmatism which should give some pause to those who think it unimportant to maintain the rotational alignment of their...
... In many states police officers are restricted from field duty as visually deficient if their monocular peripheral vision is less than 120 degrees...
When I viewed through this eyepiece, I could see out to 82 degrees on their target, but to get to 100 degrees, I had to get right down on the eyepiece. I could...
It depends how you define FOV. The human eye has significant sensitivity to nearly 180°. Photopic acuity is limited to less than the central degree, but that...
... Sorry if I scared you. This is only a concern if you disassemble the telescope. If you ever need or want to do that for some reason look for alignment...
Mike mentioned "I could see out to 82 degrees on their target, but to get to 100 degrees, I had to get right down on the eyepiece. ". What kind of eye relief...
... Ewww, might require squirting some eyeball grease into your eye to emulate the oil-spaced objective phenomenon of certain APOs. :-) That's one reason I...
Hehehehehe...... It isn't quite that bad, but I am used to the pretty solid 20mm eye relief from my TV Radians, so looking through the Ethos was a bit odd. I...
Howdy everyone, Okay today I was playing with the Taurus II Tracker I just got at a good bargain. I calibrated the focusing and works great! This is going to...
To check a telescope for astigmatism take out the star diagonal and put in the highest power eyepiece (50x per inch of aperture). Put a moderately bright star...
Hi guys, I have a 100mW green and blue laser, a 250mW red laser, and a 10mW souped up green laser pointer. The 10mW green pointer appears brighter than the...
... Hmmm, if you view the videos at Wicked Laser's site: <http://www.wickedlasers.com/> [click on "green lasers" then "Evolution" then "Watch more videos"] ...
"Off-axis" means not at the center. It has to be that way, or the mirror that deflects the light to the guide port would leave a big hole in your image. ...
Thanks so much John for the info! Shows how much I know about them LOL. Actually I never used one so I was thinking ide get a whole view but a dimmer one but...
Hello folks, I want to upgrade my focuser unit on my ultima 11 and was wondering if I should go with a sct crayford focuser or with the JMI motofocus. I...
... So it came with another camera as autoguider in addition to the SAC7? ... Sure. -John ... __________________________________________________ Do You Yahoo!?...
No sorry John I worded that wrong LOL. It came with a box which is this: "DIY KIT 108: Serial Isolated Input/Output Module" WHich I assume it can be used with...
Condition was fair this morning. The GRS has an interesting blue ring inside it! Above it is also interacting with the STB remnant. The SEBs is already very...
... Any idea who made that item? My best guess is that it's something used to send autoguiding commands from a computer through the computer's serial port to...
... However, there can be good reasons not to guide this way. The LX200 classic, for example, is capable of better guiding performance using the guider...
I am not sure who made it. I'll see if I can find out though. Ah I wish I had my LX200 here with me in BC but it is in Ontario at my parents home GRRRR. I...
But it sounds like this device sends the commands through the computer's serial port, so would it make any difference? -John ... something ... serial ... for ...
Allan, As far as "upgrading" your Ultima 11 focuser...installing a secondary Crayford type focuser should eliminate the image shift inherent in most SCT...
Does anybody know the part number for D1 on a Losmandy model 492 controller ? The one I've been using seems to be toast, and my SCT will soo no action until...
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