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Locking down mirror for Optec TCF-S
I have received the Optec TCF-S and as indicated in the documentation, the
process for setting the focus range is to move the mirror to a get fairly good focus on the subject, lock down the mirror and then use the Optec to fine tune the subject. The screws received with the C14 are just long enough to lock down the mirror when it has been set as far back as possible (hope thats the right term to use). Has anyone had to deal with replacing the screws and what did you do/use. This is a new enterprise for me as the scope is only a couple weeks old and the focuser arrived yesterday, so I appologize if my question has not been stated correctly. Thank you Jim Anderson |
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New Images
I posted some new images to "Ken Images" in the Files area. The new
ones are M13, M51, and M57. These were some quick exposures I made with my new AP1200 mount. Really improved performance. The M57 shot is at f11. Did it just to see how well the mount would track. M51 and M13 are with a 3.3 reducer that gives about f4 with the C14. Comments welcome. Ken |
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Moisture in OTA
garynburk
Hi all,
I wrote a while ago about moisture in my C14 that was frezzing on the inside of the corrector plate. Wayne G. and Paul A. responded with suggestions. I did try these with good success. Particularly, by inserting a 1/2" piece of PVC through the primary center and blowing low pressure, filtered dry air through it for 10 minutes, the problem has cleared up. I dried the air by loosly filling the 1/2" pipe with paper bags of dry silica gel, and put a piece of HEPA rated filter material on the input to the small fan. The air flow was very gentle, I did not measure its rate of flow but doubt if it exceeded one air change per minute. Since then, I've been putting the scope to bed with a dry silica gel pack in the eypiece tube. In spite of some cold weather that frosted the outside of everything in the observatory, the corrector stayed clear. Thanks for the help. Regards, Gary |
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Looking for Flip Mirror suggestions
I am looking for suggestions on which flip mirror to purchase. My image
train on the C14 consists of Optec TCF-S, 6.3 Compressor and MX7-C. I would like to add a flip mirror between the focuser and Compressor and looking for suggestions on the best for the above configuration and is available (no 3 month waiting). Thank you. Jim |
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Increasing Contrast in C14
ckellynetgatenet
Greetings, all.
In really drak skies the scope does very well. But I have a friend with an Astrophysics refractor and we argue about contrast. I cannot fix the central obstruction, and I keep the optics pretty clean. But when I look down the tube towards the primary, I get the idea there is light bouncing off the tube wall (flat black paint), and possibly into the rest of the system. Some refractors use velvet interiors to provide superior baffling, and I am looking for opinions on whether lining the tube interior with flat velvet or felt would be worth the trouble to increase my contrast. Thanks in advance. Clear skies! |
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Re: [C14] Any experiences with Kendrick SCT Laser Collimators?
Joline and Alvin S.
开云体育I ALSO WOULD LIKE TO KNOW ABOUT THE USE OF A LASER
COLLIMATOR ON A 14.ALSO IN REGARDS TO THE MOUNT FOR THE 14-I PURCHASED MY
TELESCOPE IN MID-1998 AND IT CAMEWITH THE LOSMANDY MOUNT. THE MOUNT WAS NICELY
CONSTRUCTED BUT COULD NOT HOLD THE TELESCOPE AND AFTER SEVERAL CALLS TO
CELESTRON AND LOSMANDY I TRADED THE MOUNT TO A COMPANY ON THE NET WHO SELLS USED
EQUIPMENT FOR A FORK MOUNT.LUCKILY THE OTA WAS TAPPED FOR THE ALIGNMENT PINS AND
MOUNTING BOLTS TO ACCOMMODATE THE FORK SADDLE ARMS .
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Re: [C14] What eyepiece to fill in the gap?
开云体育Paul,
?
I took
the beast out tonight to a some what semi dark site called the Forks of the
Credit River (just north of Toronto) as the weather man/women is calling for
rain for the rest of the week.? The moon washed everything out (I think
they call it a Hunters moon).? Could not?get even M51, 63, 81, 101
into view.? M31 was the only item you could see.? Tried the Pentax
5.2mm?on it and was able to resolve down to individual stars but they were
fading in and out?- not stable at all.? Moon looked fantastic with the
5.2 and fit perfectly in the Pentax 40.? Jupiter was to bright to resolve
much of the bands.? Split some doubles and waited for Andromeda, but
she?hadn't cleared the trees yet when we shut her down at 1:30am. (have to
work in the morning)? The 28mm worked well on everything else but all in
all the seeing was very bad even for a clear sky.? Temperature only dropped
down to 7'C with a breeze of about 10-15klm.? Some shaking with the higher
powers.?
?
Hope
others will have a better week and look forward to hearing everyones
exploits.?
?
Clear
skies to all.
?
Jim
?
?
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Re: [C14] Re: Does the C14 OTA visual back accept a 2" diaganol?
Joline and Alvin S.
开云体育I USE A55 MM TELEVUE FOR LOOKING AT GALAXIE GROUPS
SUCH AS M65,M66 AND NGC3628. ALSO GOOD FOR M35 AND COMPANION OPEN CLUSTER
NGC2158.ALSO GALAXIES IN THE VIRGO AND COMA REGIONS.
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Finderscope - was - Re: [C14] Does the C14 OTA visual back accept a 2" diaganol?
Good afternoon Jim:
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I use the Celestron 7x50 Polaris Finderscope. It is a very nice finderscope and can double in the role of rough polar alignment. Clear skies, Kevin Dixon ksbtk@... From: "Jim Anderson" <jim.a@...> Side bar - I have not selected a finder scope yet (telrad only) and would |
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Re: [C14] What eyepiece to fill in the gap?
Perhaps an 18 mm Radian. Gives wonderful views at about 250x.
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Clear skies, Kevin Dixon ksbtk@... From: "televue102" <televue102@...> 31 Nagler, _________, 17 Nagler, 9mm Nagler, 3-6 Nagler zoom. |
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Re: [C14] Does the C14 OTA visual back accept a 2" diaganol?
开云体育Since Johannes answered the first question, I'll
answer the second.? I use 50 pounds of counterweights on my CI-700.?
That is, two 25 pound counterweights.
?
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Re: [C14] What eyepiece to fill in the gap?
开云体育Paul,
?
What
would you recommend for the higher range ( than the XL5.2)?? A 3 or 4mm
maybe.? Who's??
?
Jim
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Re: [C14] What eyepiece to fill in the gap?
Jim,
I don't know when you will ever get to use a power that a 6mm or lower EP will produce. ?The 3910 focal length of the C14 would mean that a 6 mm would produce 650x, a 5 mm 782x power. ?You would have to have extraordinarily good conditions to allow you to go that high without serious image degradation. ?I hardly ever get above my 9 mm Nagler at 434x even on above average nights. ?That is just my experience. Paul Atkinson |
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Re: [C14] What eyepiece to fill in the gap?
JOHN W DOROTHY SINNAR
What do you not like about the 22mm Nagler T4.........? Everything I have heard says it is a great eyepiece................... Am considering it for my C11. ?
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Re: [C14] Does the C14 OTA visual back accept a 2" diaganol?
开云体育Thanks
for your reply Paul,
?
I
spoke with my dealer and their response was the Celestron finder was acceptable
for what I wanted.? I have the telrad already on the C14 - just wanted to
be able to get down within 5 - 7 degrees of what I?was searching for.?
So far with?the Telrad and the 40mm Pentax, I haven't found the need for
anything else but thought I might be missing a better tool to find the objects
quicker or to complement what I have.? I agree the Starbeam looks sexy from
the uninitiated perspective (haven't seen one in action yet but size and from
Tele Vue to boot are good selling points)?and I would look at using it on a
smaller scope than the C14 (telrad on a FLT110 just doesn't seem appropriate :)
.?
?
?
As for
the eyepiece request from televue102?- My vote is for the Pentax
XL28.??It fills?the cap with what I have which
is
?
Pentax
XL40, Tele Vue 31, XL28, XL14, Tele Vue 10.5, XL5.2
?
Jim
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