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Decision made! 6" F8 high spec ordered

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#1 mike bacanin

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Posted 14 September 2013 - 10:26 AM

I've really missed having my own scope since having to sell a little while back. i'm now in a position to reacquire an ota. after much consideration,in particular keeping in mind my issues with arthritis affecting my hands, i decided to go again with a high spec 6" F8 newtonian. I built one several years ago around a heavy tal 150 steel tube, and it was an outstanding performer.
I am purely a lunar and planetary visual observer, so i have ordered a customised ota from orion optics, who are close to my home.
It will have a primary of around 1/12th wave peak to valley, maybe a touch better, with zygo report. the secondary will be smaller than normal, to similar optical standard. Mirror cell will be 9 point cnc fully adjustable with fan incorporated.
tube will be steel due to budget limits. focusser to be a 10-1 crayford which orion currently fit, and not the orion OC1.
tube will have a carry handle incorporated to the tube rings. i picked up a similar ota and its light as a feather for me. my plans include trying to find a HEQ5 to replace my CG5, and maybe a 450mm pedestal instead of the typical steel tripod. i currently keep my mount out under a 365 cover, with absolutely no problems. i intend to do the same with any new mount.
eyepiece wise, i think a 6mm BG0, perhaps also a 5mm BGO and 4mm ortho in due course.
whilst i know this is not a big scope, i think for my situation and seeing, it will be nice. certainly my previous 1/10th primary 6" from orion was a wonderful performer, quite easily revealing 5 plato craterlets with a 6.7 uwa 4000 ep. so i hope this will at least match and i'll be happy.
I'll post photos etc in due course, and hope to pick up the ota around 1st week of october.

mike

#2 panhard

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Posted 14 September 2013 - 10:54 AM

I think you have made a good choice considering your condition.

#3 Ed D

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Posted 14 September 2013 - 12:09 PM

Awesome scope. Hopefully you will have it soon so you can get it ready for the upcoming Mars opposition.

Ed D

#4 mike bacanin

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Posted 14 September 2013 - 12:16 PM

Thanks for the comments. here is a photo of the previous scope i owned, the new one will be very similar. i'd like to find another pedestal, they are rock solid and look good.

mike

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#5 Spyke

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Posted 14 September 2013 - 02:07 PM

I used to own an Orion made 6" f8 with curved spider, 1/10th wave optics, Hi-Lux coatings etc. It really was a great performer. Why oh why did I sell it?

Congratulations on a fine purchase Mike! :)

Ant :cool:

#6 mike bacanin

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Posted 14 September 2013 - 02:55 PM

Hi Ant,

thanks! i'm in the good position of knowing pretty much how the scope will perform, from experience with the previous ota.
i've just found a 6mm BGO, which will give a nice x200 for most nights.

mike

#7 george tatsis

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Posted 14 September 2013 - 03:01 PM

Mine was a 6" f/11 with curved spider vanes, lamda/10 as well.
Awesome performer, but no better than my 120ED riding on a Tak Teegul alt-az mount!

George

#8 mike bacanin

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Posted 14 September 2013 - 03:48 PM

Hi George,

I find that quite surprising, because mine easily matched my former FS 128 in resolution, and very contrasty views.
i did not rate my former 120 DS Pro anywhere near either the tak or the 6"
however you may have a good example, as my former 120 was suffering a fair amount of overcorrection on the optical bench and needed the air gap altered.

mike

#9 roadi

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Posted 14 September 2013 - 05:29 PM

Wow Mike! Congrats on your great looking setup, such a six incher will cut through the atmosphere. Serious planetary performance should indeed be expected, very nice! ;)

#10 RAKing

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Posted 14 September 2013 - 05:35 PM

Mike,

It's great to hear that you are back in the game! :woohoo:

I hope this new scope works as well as expected -- and I hope you can keep it for a while!

Cheers,

Ron

#11 george tatsis

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Posted 14 September 2013 - 11:28 PM

Hi George,

I find that quite surprising, because mine easily matched my former FS 128 in resolution, and very contrasty views.
i did not rate my former 120 DS Pro anywhere near either the tak or the 6"
however you may have a good example, as my former 120 was suffering a fair amount of overcorrection on the optical bench and needed the air gap altered.

mike


Hi Mike,

To be fair,I should have mentioned that the 6" started performing like a champ and edging out the 120ED only after I had a 80mm exhaust fan installed!

Without the fan the performance was no better than any run of the mill reflector.It must have been the extra long and slightly narrower tube Orion Optics uses for this particular design , which is prone to horrible tube currents.

Make sure your new reflector has an exhaust fan installed to take full advantage of what the new telescope has to offer.In addition, OO used to have some metal tube-end caps.

Ask Barry to open up a hole the size of the fan in the middle of the bottom tube end cap I mentioned in the previous paragraph and install the fan there if there is no room for it in the 6" mirror cell.

By doing so,the air will be forced to be drawn from the upper end ,and not from the sides of the telescope which will be now covered by the end cap.

Congrats on the new scope!

George

#12 nicknacknock

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Posted 15 September 2013 - 08:05 AM

Mike,

A quick one: OO makes mirros up to 1/10. Are they making a special mirror for you? I am quite interested in any details you can post as I plan to place an order with OO pretty soon..

CS,

Nick

#13 mike bacanin

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Posted 15 September 2013 - 12:17 PM

Hi George, Nick.

The 9 point cell will have a fan installed as supplied, using a convenient 12v power lead. I agree its a must, the previous scope had one and it was superb.
Orion can, at a extra cost,make a mirror that should exceed 1/10th, You would need to discuss with them.
Certainly the last ultra grade 6"mirror set i had were more like 1/11th as per zygo and i can honestly say it was a fantastic performing ota.

Mike

#14 mike bacanin

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Posted 15 September 2013 - 12:21 PM

Hi Ron,

Good to hear from you! I'm excited about this scope. I think teamed with decent orthos like BGO, it will be a nice planetary and lunar visual performer.

Mike

#15 george tatsis

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Posted 15 September 2013 - 01:31 PM

I guess you have a winner here with all the specs you're giving us :waytogo:

Looking forward to your first light report.

Best of luck,

George

#16 Bonco

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Posted 15 September 2013 - 02:51 PM

Ahh,
The 6 inch f/8 coming back into vogue... It's about time.
Bill

#17 Spyke

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Posted 16 September 2013 - 05:13 AM

Do you have an ETA for this OTA, Mike?

Ant

#18 pstarr

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Posted 16 September 2013 - 06:07 AM

Do you have an ETA for this OTA, Mike?

Ant


I'm trying to picture a 9 point mirror cell on a 6" mirror. The triangles have to be tiny. A 3 point, or no points would be fine. Hopefully the ETA for this OTA will be PDQ.

#19 mike bacanin

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Posted 16 September 2013 - 01:23 PM

Hi,

I'm hoping to collect this saturday october 12th october.

Mike

ps i just located a HEQ5 mount at a great price!

#20 Spyke

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Posted 16 September 2013 - 03:05 PM

Yep, that's a great find for the mount! I love my non-GoTo HEQ5, even if it is white! ;)

#21 azure1961p

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Posted 16 September 2013 - 06:06 PM

Mike Im really looking forward to your first light report. Should be terrific.

Pete

#22 mike bacanin

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Posted 23 September 2013 - 02:07 PM

just a short update.
i have found a virtually mint HEQ5 mount, and will be picking up a 550mm pedestal from orion optics on saturday, last one they had. this will be a rock solid mount setup!

mike

#23 azure1961p

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Posted 23 September 2013 - 05:26 PM

Lol - cheerin u on Mike!!

Pete

#24 mike bacanin

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Posted 24 September 2013 - 02:04 PM

Thanks Pete! really enjoying getting this together. :grin:

Mike

#25 mike bacanin

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Posted 29 September 2013 - 03:06 AM

Picked up the pillar yesterday. just had to slightly modify the azimuth post to clear the HEQ5 base casting internally, but otherwise a rock solid setup, and looks superb, with the pillar finished in white. I'll take a photo this week and post it. Also found a 5mm BGO, which will provide a nice high power for the ota. What has really pleased me is i have been able to reacquire the Meade 4000 6.7UWA smoothside which performed wonderfully on the previous 6" i built up a couple of years ago.All's on track timewise for the ota, and i decided to upgrade the 50mm finder to right angle for ease of use. Can't wait to pick up the scope in 2 weeks!

mike






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