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

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WarrenS
Carpal Tunnel

Reged: 03/04/08

Loc: Orange County New York

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

[Re: watcher]
#5212814 - 05/08/12 08:53 PM

Question Markus, is the dewshield sliding or reversible?

Post Extras:

APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

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

[Re: WarrenS]
#5213152 - 05/09/12 02:01 AM

the dew shield is sliding !

Post Extras:

APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

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

[Re: APM M.Ludes]
#5213209 - 05/09/12 05:26 AM Attachment (78 downloads)

here a tube sheme drawing for the 152 mm F/1200 mm

Markus

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Astrojensen
Post Laureate

Reged: 10/05/08

Loc: Bornholm, Denmark

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

[Re: APM M.Ludes]
#5213219 - 05/09/12 05:34 AM

Wow, the design looks great! How much back focus do you plan for? 180mm seems to be a sort of standard these days and is enough for me.

Clear skies!
Thomas, Denmark

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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]
#5213312 - 05/09/12 08:22 AM

What is the O.D. of the tube, Markus?

Post Extras:

APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

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

[Re: Astrojensen]
#5213473 - 05/09/12 10:26 AM

180 mm Backfocuse was choosen, yes

Post Extras:

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]
#5213474 - 05/09/12 10:27 AM

this technical details, tube diameter, weight etc follow as next , please wait

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Radim
sage

Reged: 11/06/05

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

[Re: watcher]
#5214075 - 05/09/12 03:52 PM

Sorry guys, I am really not getting this ....Markus now has currently on stock doublet 6inch from LZOS 2elements, I guess it is a top notch quality from LZOS for a price of below 6k EUR, why you want to run for a similar design, similar parameters but lower color correction... just for 2k EUR difference? I understand a need for a doublet, but it is already here...so why to accept lower standarts? Is the price really such a driver for not taking LZOS?

Sorry do not want to start a flame ..
R.

Edited by Radim (05/09/12 04:19 PM)

Post Extras:

Mark9473
Postmaster

Reged: 07/21/05

Loc: 51°N 4°E

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

[Re: Radim]
#5214097 - 05/09/12 04:04 PM

"Is the price really such a driver for not taking LZOS?"
Yes.

Post Extras:

saemark30
scholastic sledgehammer

Reged: 02/21/12

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

[Re: watcher]
#5214194 - 05/09/12 05:22 PM

>>The 140mm with FPL 53 for $3500

Is this in US currency?

Post Extras:

APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

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

[Re: saemark30]
#5214224 - 05/09/12 05:48 PM

The 140 F/7 FPL 53 will not comes as FPL, it turned out that even at 200 pc the FPL53 with mating glas is to expensive, so we will switsch it to the same design as the 152F/8 then the price will be hold or more close to $ 3,000, but right now we finishing first the 152 design, then we move to the 140 model

However we plan to release a 160 mm F/7.5 doublet in a price range between 5000 and 5500 $ retail. Here the cost are known by today

Post Extras:

Cyclop_si
professor emeritus

Reged: 03/13/08

Loc: Slovenia

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

[Re: APM M.Ludes]
#5214785 - 05/10/12 12:48 AM

Quote:

...However we plan to release a 160 mm F/7.5 doublet in a price range between 5000 and 5500 $ retail. Here the cost are known by today

Great news!

Post Extras:

APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

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

[Re: Cyclop_si]
#5215067 - 05/10/12 09:04 AM

about the 152 mm doublet

weight optical tube without focuser : 6.9 kg = 15.2 lbs , so with focuser it should be around 17 lbs
tube diameter : 156 mm = 6.14 inch
dew shield diameter : 186 mm = 7.32 inch

Post Extras:

SteveG
Post Laureate

Reged: 09/27/06

Loc: Seattle, WA

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

[Re: APM M.Ludes]
#5216026 - 05/10/12 06:06 PM

Nice - sounding good Markus! The only comment I have is a prefer a nice tapered barrel where the tube meets the focuser. It just looks a little nicer than the ones that utilize a "flat" flange. Yours shows a little bit of an angle already. I'm saving for the 6"!

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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]
#5216196 - 05/10/12 08:16 PM

Quote:

The 140 F/7 FPL 53 will not comes as FPL, it turned out that even at 200 pc the FPL53 with mating glas is to expensive, so we will switsch it to the same design as the 152F/8 then the price will be hold or more close to $ 3,000

Even better! Still F/7 I hope?

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WarrenS
Carpal Tunnel

Reged: 03/04/08

Loc: Orange County New York

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

[Re: watcher]
#5216353 - 05/10/12 10:48 PM

I like the weight specs, if I do get this scope it'll be mounted on my Atlas. As I plan to swap the 6" with my 127EDT for AP, the weight plus guider and DSLR should be close to the same.

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Sol Robbins
Carpal Tunnel

Reged: 12/01/03

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

[Re: WarrenS]
#5216368 - 05/10/12 11:08 PM

Though I have been reading through this thread, did I miss how much the projected price would be for the 6" lens retrofit on a Synta tube?

Best,

Post Extras:

APM M.Ludes
Vendor (APM Telescopes)

Reged: 05/01/03

Loc: Germany

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

[Re: Sol Robbins]
#5216583 - 05/11/12 05:26 AM

Sol

the lens in cell price follows soon

Post Extras:

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]
#5216586 - 05/11/12 05:28 AM

Hi Joe

regards the 140 mm F/7 , please ask around whats acceptable

Using on the 140 F/7 the same glas combination then on the 152 F/8, the correction of the 140/7 is visible worse.

If we go to 140 F/7.5 we are similar then the 152F/8

if we go slower like F/8 or F/9 its get better and better

so we recomment minimum F/7.5

can you ask around so I get many feedbacks whats acceptable ?

thanks

Post Extras:

meade4ever
sage

Reged: 08/23/07

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

[Re: APM M.Ludes]
#5216650 - 05/11/12 07:43 AM

For me, the best choice would be a 150mm/f10 because it is still manageable and should provide better views being slower and with less CA.

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