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Carton 100mm f/13

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#51 Doug76

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Posted 30 January 2010 - 02:42 PM

It will indeed satisfy your need. I have already come to the conclusion that if I could keep but one scope, this 100mm f/13 would be it. It's like seeing the heavens for the first time. It's that dang good.

#52 dawsonian2000

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Posted 30 January 2010 - 02:59 PM

Well Doug!

I will be taking the plunge. :grin: I contacted Sheldon and I will be going forward with the mounted version of the achromat. I just hope he will be patient long enough to allow me to sell my 90mm OTA. I believe he will. I just need confirmation from him, which I am awaiting a reply. Thanks for forcing my hand to spend more money! :bawling: :grin: More later.


Mel

#53 Doug76

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Posted 30 January 2010 - 03:02 PM

Your welcome, I think?! :lol:

#54 dawsonian2000

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Posted 31 January 2010 - 08:03 PM

"Your welcome" is definitely in order, Doug! I will be prepping the 90mm for sale soon. :grin: Thanks again!


Mel

#55 Doug76

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Posted 01 February 2010 - 08:23 AM

Your welcome pardner. Good luck with the sale!

#56 dawsonian2000

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Posted 06 February 2010 - 05:16 PM

Hi Doug,

Well, I placed my 90mm partial OTA up for sale under the Refractor Classifieds on CN. Priced at $125.00 for the OTA without focuser. A good price considering that I paid $200.00 for the replacement objective alone from Island Eyepiece and Telescope. Hopefully, I will sell it soon to help fund my Carton 100mm. I kept the dual-speed crayford focuser I purchased for the 90mm. The 90mm is a great scope and is nothing like the original Konus instrument it was before. All it has in common with the Konus is the name on the tube.

Here is my ad: => 90mm f/11 Konus Refractor Tube w/ Research -Grade Objective Upgrade - NO FOCUSER


Mel

#57 Doug76

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Posted 06 February 2010 - 10:10 PM

Here's hoping it sells soon.

#58 Doug76

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Posted 09 February 2010 - 03:10 PM

The 100mm has convinced me I am a total refractor guy now. To that end, I am selling my new and hardly used 8" SCT. Now it is a good one one, but I know from now on the 100mm f/13 and the C6R will be my scopes of most use in the observatory for visual, the AT90EDT there for AP, and my smaller Cartons for grab and go. I just plain prefer the view through glass. It's pure, and it feels that way to me. So bye bye SCT!

#59 dawsonian2000

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Posted 09 February 2010 - 05:41 PM

Hey Doug!

You are just making me thirstier and thirstier to get the 100mm Carton. Carton... Carton!... Carton!!! :drool: :grin:

It appears there isn't a great need for a 90mm these days. Perhaps, it is the Konus tube that's scaring amateurs away. I had a couple of inquiries, but no serious bites. Actually, the deal I am offering just got sweeter. I reduced the price from $150.00 to $125.00, but the buyer must pay shipping. If I haven't sold it by Wednesday of next week (or perhaps sooner; depending on how I am feeling), I am keeping it and will not offer it again. Really, I hate to sell it; it is just that good a scope. I was hoping to sell it rather quickly to buy the new lens. Well, it looks like I will be making my purchase on Wednesday of next week and keeping my 90mm too. By then I will have the funds without having to sell my 90mm. I'll have to learn to be more patient in the future.

Good luck in selling the SCT. Chances are great that you will not have any issues selling it.


Mel

#60 Doug76

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Posted 09 February 2010 - 07:41 PM

The 100mm f/13 is my baby now, for sure. But I'm still keeping and using the Carton 80mm f/15 Sheldon built for me first.
The 90mm you have is nothing to sneeze at. If you must, keep it and on occasion use it. But if you leave it listed you will likely sell it eventually.

#61 dawsonian2000

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Posted 09 February 2010 - 10:36 PM

Good point, Doug! Might as well keep it. I will be pulling the ads shortly. Thanks for helping me see the light. More to report later.


Mel

#62 Doug76

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Posted 09 February 2010 - 11:09 PM

I, on the other hand, did not follow my own advice. I need a larger mount, and have precious little time to view because of my job. To this end I have come to the conclusion that some of my scopes have to go. I'm keeping the C6R, the Carton 100mm (naturally!), the AT90EDT, and the Carton 60/1000. The rest in my sig are up for sale now in the Swap & Shop section.

#63 dawsonian2000

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Posted 10 February 2010 - 03:03 AM

A very nice collection of telescopes you have for sale, Doug! You should not have any problems selling them. Especially, the Carton 80mm f/15! If I wasn't going after the 100mm, I would consider buying it. From checking out the responses you got under the Shop & Swap ad you posted, it may already be gone! I will be contacting Sheldon to let him know I will be ready to purchase the 100mm lens next week.

BTW - What are the dimensions of your 100mm's tube? Can you provide me with the outside diameter and wall thickness? Currently, I am looking at a 4' length of 4" O.D. x .065" wall thickness aluminum tubing for the new scope. Seems like it should do the trick. The price + S&H is about $45.00. Any information you can offer would be appreciated.


Thanks in advance!

Mel

#64 Andy Howie

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Posted 10 February 2010 - 05:22 AM

Out of interest.
What's the cost of the 100mm Carton lens cell? Haven't seen that posted in Sheldon's ad's.

Cheers,
Andy.

#65 Andy Howie

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Posted 10 February 2010 - 12:22 PM

Out of interest.
What's the cost of the 100mm Carton lens cell? Haven't seen that posted in Sheldon's ad's.

Cheers,
Andy.


Mmmm. That may conscreud as being a bit rude to ask how much :o
What I should have said was, are they available for purchase?

Cheers,
Andy.

#66 dawsonian2000

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Posted 10 February 2010 - 01:55 PM

Hi Andy,

Many an occasion I have considering asking the same question. But, I refrained from doing so. I will be purchasing one of these lenses next week, and I feel confident that Sheldon may have more. All I can say is the cost is justified considering the fantastic performance reviews this lens has generated. I recommend that you contact Sheldon about the lens through one of his posted ads in the CN classifieds, and he will promptly provide you with the price of this lens (mounted and unmounted). I have done business with him on several occasions and I have not been disappointed in the least.


Mel

#67 Andy Howie

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Posted 10 February 2010 - 02:40 PM

Tell me about it Mel :)
I've had a few bits n pieces off him and he seems a great bloke.
Recently got my Carton 60/1000 and am gobsmacked by the views. A 4" piece of Carton glass would be :jump: :jump:
The pics I've seen are a work of art. In fact I showed them to my wife, who, after saying no, repeatedly(I didn't even mention anything about a purchase!!), she finally did say it was rather nice :roflmao:

Cheers,
Andy.

#68 Doug76

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Posted 10 February 2010 - 04:29 PM

Mel, I got my tube from Speedy Metals. I bought a 48" length, but Sheldon did cut it a bit shorter. It is 4"OD, 3.75'ID, 1/8" walls. Very stout, but not all that heavy. Has that built like a tank feel! :lol: I spent about $48+shipping for mine.
Overall, the scope is about the same length as a C6R, which I also have. My version of the 100mm weighs 16lbs.
As for the cell, I just bought the material Sheldon asked for. I let him quote the prices.

#69 dawsonian2000

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Posted 10 February 2010 - 07:50 PM

Tell you what, Andy! If I would not have gotten my hands on my Tasco 7te-5, I would have jumped down on one of those Carton 60/1000 objectives myself! Actually, a may just buy one to have on hand anyway! The price for them are incredible, considering their performance.

Hey Andy! It would be nice to see a picture of yours.


Mel

#70 dawsonian2000

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Posted 10 February 2010 - 07:55 PM

Hey Doug!

Thanks for the information regarding your tube. I have done business with Speedy Metals in the past, so I will have to check them out again. The price of your tube was not bad at all! I will be going with one that has a thinner wall thickness. I will be initially pushing it with a CG-5, which should handle the weight of it effectively.


Mel

#71 Doug76

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Posted 10 February 2010 - 08:45 PM

Yeah, my CG-5 is wiggling a bit under the combination of the extra weight and the long length.

#72 Doug76

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Posted 10 February 2010 - 08:48 PM

Tell you what, Andy! If I would not have gotten my hands on my Tasco 7te-5, I would have jumped down on one of those Carton 60/1000 objectives myself! Actually, a may just buy one to have on hand anyway! The price for them are incredible, considering their performance.

Hey Andy! It would be nice to see a picture of yours.


Mel


Sheldon has 60/700 Carton lenses too, and they are a direct fit in the Towa cell. I did that in my shorter Towa.
He will also just sell the Carton 60/1000 lens, very cheap. I find them to be a bit better in all respects than the Towa's myself.
I was a Towa fan, until he turned me onto these Carton's.

#73 dawsonian2000

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Posted 10 February 2010 - 10:25 PM

Tell you what, Andy! If I would not have gotten my hands on my Tasco 7te-5, I would have jumped down on one of those Carton 60/1000 objectives myself! Actually, a may just buy one to have on hand anyway! The price for them are incredible, considering their performance.

Hey Andy! It would be nice to see a picture of yours.


Mel


Sheldon has 60/700 Carton lenses too, and they are a direct fit in the Towa cell. I did that in my shorter Towa.
He will also just sell the Carton 60/1000 lens, very cheap. I find them to be a bit better in all respects than the Towa's myself.
I was a Towa fan, until he turned me onto these Carton's.


Doug,

I must say that I am also a fan of Towa's. I have a couple of Jason's (313 and 280). My first store bought astonomical scope was the Jason 280, or some call it the 311. It's 60/700 objective performs quite well; even with the lowly Huygen eyepiece that came with it. The Jason 313 60/910 is really not a bad instrument either. In a side-by-side comparison with the Tasco 7te-5 60/1000, it fell behind by a tiny margin in sharpness. Contrast against the 7te-5 was on par.

So, do you know how the Carton 60/1000 stacks up against the Tasco 60/1000?


Mel

#74 Andy Howie

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Posted 11 February 2010 - 08:58 AM

Mel - Be sure and keep us posted about your build, also!!
Seeing lovely pics, sure makes this wet, cloudy winter, more bareable.
And Doug.....keep the 4" reports comin' in when the clouds part.

Cheers all,
Andy.

ps: uploaded some Carton ota pics in me folder if anyone is interested.

#75 Bonco

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Posted 11 February 2010 - 04:38 PM

Just want to add my positive comments about Sheldon's Carton lenses. I now have two of them, 80mm f/15's. These replaced defective lenses in a Towa and a Tasco. The first one I received was thouroghly tested in steady skies and I was amazed at its color correction, star tests, and contrast on Jupiter. I'm having weather problems after receiving the second lens but despite that I've seen great views of eta Orionis, Alnitak and Rigel. Once my skies steady I think it will likely prove to be equal in performance to the first one. I am a huge advocate of these Carton achromats and many thanks to Sheldon.
Bill


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