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Carton 100mm f/13

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#26 Doug76

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Posted 24 January 2010 - 12:05 AM

BTW, I was using the two new Kellners Sheldon made for me also, besides that green labeled 24mm in the picture. :lol:
The Kellner's, in this scope, provide a very sharp and bright image. Viewing M81/82 and M42 provided more to see in the faint details than the Panoptic could manage. I must admit the 21.7mm Kellner was my favorite.

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#27 mustgobigger

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Posted 24 January 2010 - 12:30 AM

looking good doug.
:bow:

#28 mikey cee

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Posted 24 January 2010 - 11:33 AM

Doug....Now you are seeing why a pier mounted long focal length 4" is revered by those who are in the know. Screw theory....it's a whole different ball game in real practice!! :smirk:Mike

#29 Doug76

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Posted 24 January 2010 - 02:21 PM

You got that exactly right Mike! It's phenomenal.
Thanks for the compliment Brian.

I now know I could be happy with just three of the scopes I own.
1) 100mm f/13 Faworski/Carton, planetary
2) 150mm f/8 Celestron C6R, deep space
3) 90mm f/6.7 Astro-Tech AT90EDT, imaging.

Of course, I'd still need one for traveling in the big truck, wouldn't I? :lol:

#30 Bonco

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Posted 24 January 2010 - 05:27 PM

Mr. Sheldon Faworski is working on a 80mm f15 lens assembly for me. First tests by him indicate its a superb performer. He wanted to try one more combination, choosing the best before sending it to me. Can't wait to star test it.
Cheers, Bill

#31 Doug76

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Posted 24 January 2010 - 11:59 PM

I think you'll be very happy with it.

#32 DaveTinning

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Posted 25 January 2010 - 02:49 AM

Doug

that is a beautiful family of fracs you have there, congratulations!!

#33 Preston Smith

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Posted 25 January 2010 - 08:09 PM

Baffles, looking through...


Hi Doug,

How did you attach the baffles to the OTA? :question:

#34 Doug76

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Posted 26 January 2010 - 03:45 AM

Hi Preston. I shoved them in from the rear, as Sheldon instructed, until the front baffle was about 14" from the lens end of the tube. They fit quite tight, and they ain't moving.

#35 Doug76

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Posted 26 January 2010 - 03:49 AM

Update: Looks like, due to the generosity of a good friend, I will soon have a Wyorock focuser for the 80mm f/15 also.
And soon I will add a Crawmach 1.25" Crayford to the 60mm f/11.7. The 60mm f/16.7 already has one, although it is not seen in the family photo above. Four really fine Carton's, with four really fine focusers.
I tell ya, I am walking in tall cotton! :lol:

#36 Astrojensen

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Posted 26 January 2010 - 05:59 AM

Do Wyorock make brass focusers? Because if they do, you should consider adding one to the 100/1300 Carton, as well as a brass finderscope, if you could find one.

Clear skies!
Thomas, Denmark

#37 Doug76

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Posted 26 January 2010 - 11:44 AM

That would look pretty classy, wouldn't it?
But I think I'll keep it as is, but I am going to get a better finder scope for it. Most likely another Antares RAnonCI like I installed on my AT90EDT. I'm very impressed with that finder. It's a lot like the Stellarvue F50.

#38 Preston Smith

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Posted 26 January 2010 - 11:54 AM

That would look pretty classy, wouldn't it?
But I think I'll keep it as is, but I am going to get a better finder scope for it. Most likely another Antares RAnonCI like I installed on my AT90EDT. I'm very impressed with that finder. It's a lot like the Stellarvue F50.


The F50 is better! :lol:

#39 Doug76

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Posted 26 January 2010 - 04:06 PM

Not by much, I think. And I like the price difference. But I may get one some day.

#40 Doug76

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Posted 28 January 2010 - 11:25 AM

A couple of more pics I took of it in the obs before mounting the finder scope.

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#41 Doug76

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Posted 28 January 2010 - 11:25 AM

And the other....

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#42 Doug76

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Posted 28 January 2010 - 11:30 AM

New Carton Family picture coming soon, as there has been changes to the 100mm (finder scope installed) and the 60/1000 (new Crawmach 1.25" crayford focuser).

#43 7331Peg

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Posted 29 January 2010 - 01:04 AM

Doug,
Nice, nice, nice, nice.
I mean really nice.
I mean NICE nice.
Cool, too.

John

#44 dawsonian2000

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Posted 29 January 2010 - 03:36 AM

Hey Doug!

Man, what an awesome scope! Someone was selling a home built Carton 100mm f/13 OTA on eBay recently and it went for a fair price! I would love to have one of these instruments in my arsenal. In knowing that Sheldon Faworski sells them, I may have to add another build to my list! I have done business with him before and I am very happy with the products I have purchased from him. It would make an awesome planetary/ double star instrument indeed.

Yours is built like a tank! I love the craftsmanship you applied in constructing it. I wish I were close by to look through it. Have you perform First Light yet?

Congratulations! :bow: :bow: :bow: :bow: :bow:


Mel

#45 Doug76

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Posted 29 January 2010 - 08:15 AM

Yep, first light, FINALLY, was on the night of 01/21/2010.
It is everything I'd hoped for.
Even with Mars being small this time around, I was clearly able to see the large polar cap, a dark ring bordering the cap, and a white feature near the limb about midway on the globe. I've never seen it this good, even after seeing the last two oppositions. Almost like a Hubble picture miniaturized.
Saturn wasn't very high when I turned the scope on it, but the shadow from the rings was sharply etched against the planet, and I could see cloud bands easily.
Unfortunately, Jupiter was behind a tree, so I wasn't able to view it. I can only imagine the detail I'll see when I finally do get to view it.
At 108x Rigel and Polaris companions were just too easy. Saw all 6 Trap stars at same power.
Speaking of which, the M42 nebula clearly showed it's cloud-like nature. Best I've ever seen it.
M81 & M82 both fit in the 24mm Panoptic view, and seeing the gas erupting from M82 was astounding.
I believe this to be my best scope ever, no exaggeration. Sheldon did a great job on it (the paint job is my doing) and that Carton lens is outstanding.
Get yourself one, you won't be sorry!

#46 dawsonian2000

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Posted 30 January 2010 - 12:26 AM

I am still drooling after reading your report, Doug! I can only imagine the quality images this instrument conveys. You really got me excited about getting one of those objectives. I could use a true planetary scope with decent aperture to add to my collection. The 127mm isn't bad, but I wish it were at least an f/11; and it were a Carton lense.

I noted that you did not mention any CA or fringing anomalies in the 100mm. So, I presume there was none experienced to report. I'm stoked now! Don't be surprised if I start a new thread called "Carton/ Faworski 100mm f/13 Refractor Build" the near future.

You know! ...I was thinking, since I already have the North Star II field tripod, all I need to do is build the 100mm f/13 OTA and make it interchangeable with the 127mm f/9.4. Ya, that's the ticket! :D

Again, great report!


Mel

#47 catboat

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Posted 30 January 2010 - 04:42 AM

Doug,

Thanks for the first-light report and all the pictures along the way. Your scope looks great -- so does the paint!

Your posts have gotten a number of us started on similar. Months to go before I get home and get to mine -- much to look forward to.

Edward

#48 Mike Conley

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Posted 30 January 2010 - 06:45 AM

Yep, first light, FINALLY, was on the night of 01/21/2010.
It is everything I'd hoped for.
Even with Mars being small this time around, I was clearly able to see the large polar cap, a dark ring bordering the cap, and a white feature near the limb about midway on the globe. I've never seen it this good, even after seeing the last two oppositions. Almost like a Hubble picture miniaturized.
Saturn wasn't very high when I turned the scope on it, but the shadow from the rings was sharply etched against the planet, and I could see cloud bands easily.
Unfortunately, Jupiter was behind a tree, so I wasn't able to view it. I can only imagine the detail I'll see when I finally do get to view it.
At 108x Rigel and Polaris companions were just too easy. Saw all 6 Trap stars at same power.
Speaking of which, the M42 nebula clearly showed it's cloud-like nature. Best I've ever seen it.
M81 & M82 both fit in the 24mm Panoptic view, and seeing the gas erupting from M82 was astounding.
I believe this to be my best scope ever, no exaggeration. Sheldon did a great job on it (the paint job is my doing) and that Carton lens is outstanding.
Get yourself one, you won't be sorry!


Very nice Doug, your first light report has me wishing I would have purchased that lens off ebay.I've been back and forth between a long focus refractor or 6" f/8 planetary newt.

Mike

Mike

#49 Doug76

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Posted 30 January 2010 - 08:49 AM

Sheldon has those lenses, so getting one is not a problem.

Mel, looking forward to reading about your new build, when it happens.
I can't honestly say there is no CA, but I had to look for it, and frankly, I don't make a habit of it. Very, very little of it to be seen, and only on the brightest and whitest stars did I see any. Viewing Mars and Saturn I noticed none.

#50 dawsonian2000

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Posted 30 January 2010 - 01:40 PM

Hey Doug,

A pinch of CA is not an issue for me either. I focus mainly on sharpness and clarity. From what I have read from your report, this lens seems to fulfill those requirements.

I have contacted Sheldon for a quote on both the mounted and unmounted versions. I hope his reply will be appetizing. If I am satisfied with his price, I plan to sell my modified Konus 90mm f/11 refractor OTA (and maybe to mount as well) to fund the 100mm project. As for the modifications to the Konus 90mm f/11 refractor, I changed the objective to a Antares Elite Research-Grade Fraunhofer achromat, and the focuser to a GSO Dual-Speed Crayford. So, actually it is no longer a true Konus instrument. It is a great performing scope. I just would like a little more aperture and focal length. The 100mm will satisfy that niche for me.



Mel


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