Telescope Reviews: New 6" F/8 ED Doublets from APM Telescopes

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Crow Haven
Pooh-Bah

Reged: 01/09/09

Loc: Betwixt and Between

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5193518 - 04/27/12 02:33 PM

Wonderful! I'll be looking forward to your 6" f/8 lens/adapter upgrade package!

Thanks so much, Markus!

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Refractor6
Post Laureate

Reged: 10/20/04

Loc: Vancouver B.C. , Canada

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: Crow Haven]
#5193844 - 04/27/12 06:32 PM

Wow... I might bring my old Skywatcher 6" f/8 out of storage for the cell upgrade...that's if it can be had in Canada

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John Huntley
professor emeritus

Reged: 07/16/06

Loc: South West England

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: Refractor6]
#5195495 - 04/28/12 08:08 PM

This all sounds very exciting for refractor fans !

I'm about to take delivery of a Skywatcher 150 F/8 fitted with a matched Chromacor II, supplied originally by Markus I believe in 2002.

Is it likely that the 6" F/8 objective upgrade package discussed here would be a better performer than the standard objective / Chromacor II combination, assuming that the latter has been properly matched and installed ?.

Edited by John Huntley (04/28/12 08:09 PM)

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Jeff B
Carpal Tunnel

Reged: 12/30/06

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: John Huntley]
#5197397 - 04/29/12 10:37 PM

Quote:

This all sounds very exciting for refractor fans !

I'm about to take delivery of a Skywatcher 150 F/8 fitted with a matched Chromacor II, supplied originally by Markus I believe in 2002.

Is it likely that the 6" F/8 objective upgrade package discussed here would be a better performer than the standard objective / Chromacor II combination, assuming that the latter has been properly matched and installed ?.

If properly set up (which includes best spherical match, alignment of all elements and proper spacing) and the optics are good, the achromat with the Chromacor should be better corrected on-axis for both CA and spherochromatism than the new doublets. However, not very far off axis, there is considerable lateral color. The doublet will be much better corrected in that regard.

An interesting choice, but my gut tells me the new doublet would be a much better choice for me as a little bit of CA (mostly in the deep blue)and great off-axis performance is a better trade than basically no CA but poor off-axis performance....and I've got four Chromacors.

Markus, thanks for this option.

Jeff

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watcher
Carpal Tunnel

Reged: 11/21/07

Loc: St. Louis, MO

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5199046 - 04/30/12 08:47 PM

Hope you enjoyed yourself at NEAF Markus. Now that things are pretty much settled for these projects, can you give us any kind of a rough timeline as to when the first scopes might be rolling out? Gotta figure out how fast I have to save. I wouldn't want to be caught flat footed when the #0001 140mm is ready!

Can I call dibs?

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APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: watcher]
#5200225 - 05/01/12 02:03 PM

Hi Guys

I am back from NEAF since yesterday, have had some very nice views there outside on the solar field with the new Lunt LS 230, 9" Solar-H-alpha Telescope, a super large prominence showed up when we brought it out.

I spoke with 4 of the largest vendors in USA and vendors of other countrys regards our new doublets and they are all like that idea very much and promissed to enter them to here line.
This week will not happen much, since we have to prepair ourself for our own German large telescope Show ATT this coming weekend.
Next week we start to design the lens cell and the tubes, we will make all mashine drawings, talk to the lens maker about tolerances of glas and cell etc....

During May 2012, we have everyhting ready designed and will have drawings how the scope looks like with all details and prices.

Then we start the production

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Alvan Clark
sage

Reged: 03/13/10

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5200262 - 05/01/12 02:26 PM

Quote:

I spoke with 4 of the largest vendors in USA and vendors of other countrys regards our new doublets and they are all like that idea very much and promissed to enter them to here line.

They must want a profit too. The 140mm with FPL 53 for $3500 is beginning to look like the better deal if you can hold that price. I have the feeling the 6 inch is going to end up at $4500 or more by the time this is finished. Still cheaper than other scopes but a little higher than some here were expecting.

Besides the 15 or so people here have you got feedback elsewhere indicating there is a big market for these scopes?

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APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: Alvan Clark]
#5200287 - 05/01/12 02:40 PM

Hi Alvan

dont worry about prices. I am thinking from step one as a manufacturer and vendor and when we introuce a new project in volume in the market, we always have to include a vendor margin and that was already done on the initial price guess

the retail will stay below $ 4,000 for the 6", it will not change against my others promisses

Of course we could offer it somewhat less expensive , if only we would sell it worldwide, but most of you , customers around the world like to buy from local trusted vendors, thats why vendors selling telescopes :-)

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skyjim
Carpal Tunnel

Reged: 01/13/07

Loc: Long Island, NY

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5201688 - 05/02/12 11:54 AM

Markus I was not able to attend neaf this weekend, my dear brotherinlaw passed away this weekend and was not even into driving up to neaf. I am very interested in the lens cell upgrade of the 6" F8 ED, looking forward to your progres in these projects.
Jim

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watcher
Carpal Tunnel

Reged: 11/21/07

Loc: St. Louis, MO

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5209065 - 05/06/12 04:18 PM

Hi Markus. Hope you had another enjoyable show.

With regards to the 6" F/8 model. There are several recent references in the refractor forum about 1980's AP 6" F/8 scopes. Though they had less than perfect color correction, they are highly coveted visual instruments. Just wondering if you could draw any comparison between these vintage triplets and your doublets as far as color correction goes. If we knew, for instance, that the color correction was equal to, less than, or better than the old triplets, we would all have another source of reference for what would be seen at the eyepiece. Just wondering. To me a 6" f/30 achro is pure APO, but some are at least a little pickier than me.

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APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: watcher]
#5209118 - 05/06/12 04:57 PM

As a vendor , even here at the vendor forum it is not allowed to me, to speak or compare my products to any other product.
If I answere your question, the moderators have to ban me from CN by TOS, so excuse me that I do not answere your question, sorry

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watcher
Carpal Tunnel

Reged: 11/21/07

Loc: St. Louis, MO

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5209255 - 05/06/12 06:50 PM

Sorry Markus. I didn't realize it was that fine a line you had to walk.

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APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: watcher]
#5210660 - 05/07/12 05:28 PM

now you know why I sometimes disappear here , when I cross the fine line. Its very difficult for me with foreigner language to be alwas accurate with my used words.

anyway thats TOS

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Chris_H
Post Laureate

Reged: 11/24/03

Loc: Norway

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5210933 - 05/07/12 08:11 PM

So where do I sign up for the 6" and what do I do with the cash in my hand?

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APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: Chris_H]
#5212196 - 05/08/12 02:35 PM Attachment (79 downloads)

Hi

1, drop me a e-mail to anfrage@apm-telescopes.de

2, hold your cash under your pillow, till you get a ring e-mail to send it :-)

see here first picture of the scope 6"F/8

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zjc26138
Loved By All

Reged: 02/24/05

Loc: Mingo Junction, Ohio

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5212431 - 05/08/12 04:52 PM

Looks great!

I'm trying to decide if I want to buy the 6in f/8 ota, or just the lens and find an old CR6 for the tube.

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Chris_H
Post Laureate

Reged: 11/24/03

Loc: Norway

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: zjc26138]
#5212482 - 05/08/12 05:19 PM

I want bigger rings

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APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: Chris_H]
#5212535 - 05/08/12 05:46 PM

why bigger Rings ? Whats sense making bigger rings ?

we try to make the scope as light weight as possible

Non to me, but tell me

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Chris_H
Post Laureate

Reged: 11/24/03

Loc: Norway

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5212635 - 05/08/12 06:45 PM

Just messing Markus, they just looked skinny in the pic

Talking about weight, any rough estimate?

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watcher
Carpal Tunnel

Reged: 11/21/07

Loc: St. Louis, MO

Re: New 6" F/8 ED Doublets from APM Telescopes new

[Re: APM M.Ludes]
#5212750 - 05/08/12 08:07 PM

Very nicely proportioned Markus.I like the length of the dew shield. I did start another thread in the refractor forum where I came to the conclusion that the color correction should be about equal to the old AP 6" F/8 triplets maybe even a tad better!

I can't wait to see your drawing of the 140mm!

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