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

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Alvan Clark
sage

Reged: 03/13/10

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

[Re: watcher]
#5219897 - 05/13/12 09:20 AM

Quote:

You da man Markus! I have a feeling you'll be going through multiple runs of these scopes.

I'm not going to make any predictions on sales but I wish Markus well. These are a lot like the old Meade ED's. When they worked well people seemed to really like them. Trouble is, they had a lot of problems. The cell was a big problem. There also was a lot of variability in optical quality. Don't know if it was manufacturing or the glass. Markus needs to do better than Meade and then he may get a lot of happy customers. I don't think I'm going to be an early adopter on these but wait for some reviews or hopefully get a look through one.

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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]
#5220036 - 05/13/12 11:00 AM

Hi Alvan

we have a big scill in making ncie working cells, we will for shure not use such old unstable fancy cells.
Also we have a contract regards quality, anything not reacing this level will be rejected and returned to the manufacturer.
I am more then optimistic about the quality , if we find out that more was promissed , then delivered, we will postphone delivery till problem was solved, but if the manufactur follow our advise and keep the calculated tolerances on cells and polishing, I see no reason why we should have a problem.

The first batches I will controle my self and then after that every single one will be inspected by our optician , before it gets repacked and shipped

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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: Alvan Clark]
#5220061 - 05/13/12 11:24 AM

Quote:

Quote:

You da man Markus! I have a feeling you'll be going through multiple runs of these scopes.

I'm not going to make any predictions on sales but I wish Markus well. These are a lot like the old Meade ED's. When they worked well people seemed to really like them. Trouble is, they had a lot of problems. The cell was a big problem. There also was a lot of variability in optical quality. Don't know if it was manufacturing or the glass. Markus needs to do better than Meade and then he may get a lot of happy customers. I don't think I'm going to be an early adopter on these but wait for some reviews or hopefully get a look through one.

If you are anywhere near St. Louis Mo., you can come look through my 140mm when it's made. I will happily take the first one made, without thinking twice about it. If APM-Markus Ludes can't design a great lens cell and control quality, I don't know who can!

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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]
#5220093 - 05/13/12 11:46 AM

I think Markus has been doing this a long time and now the pitfalls of older designed lens cells, I am sure he will deliver the right goods and I wish him well on this venture. The option for many who now own Synta 6" F8 refractors who already have upgraded the focuser and want that final step to make there scope a really good ED scope will be realized is great. Markus has had years of dealing with this type scope back in the Chromacor days and now with a replacement lens and cell is an excellent advantage. Alos a new lets say reasonably priced 6" ED F8 scope with very decent built quality will finally be on the market for us visual observers. Its like Feild of Dreams, "build it and they will come" and they will buy.
Keep up the great work Markus.

Jim

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Alvan Clark
sage

Reged: 03/13/10

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

[Re: watcher]
#5221532 - 05/14/12 09:36 AM

Quote:

If you are anywhere near St. Louis Mo., you can come look through my 140mm when it's made.

Thanks for the offer but that would be a bit of a drive. I still want to see the final pricing on these too. If I'm going to get one I might as well wait and see if he makes the 160mm.

EDIT: I want him to be successful, otherwise he won't do anything like this again.

Edited by Alvan Clark (05/14/12 09:39 AM)

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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]
#5221712 - 05/14/12 11:28 AM

The 160 design is made, FPL 53 delivery takes 4 month, production time for first sample around 9 month

Post Extras:

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]
#5222104 - 05/14/12 03:05 PM

Markus, whats the ballpark guess of the price for the 160?

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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: zjc26138]
#5222187 - 05/14/12 03:43 PM

On page 8 of this thread he posted the price to be between $5K and 5.5K for the 160. For an FPL 53 scope? Could be close in price to the 152mm scope. ????

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saemark30
scholastic sledgehammer

Reged: 02/21/12

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

[Re: WarrenS]
#5223719 - 05/15/12 03:01 PM

I thought it was a 140mm FPL53 scope.
Is it up to a 160mm now? I'll take one.

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saemark30
scholastic sledgehammer

Reged: 02/21/12

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

[Re: saemark30]
#5223729 - 05/15/12 03:05 PM

Seems it won't use FPL53 at all. Not sure if we need a 140mm using the Chinese glass then.
But 160mm would be comparable to Meade ED scopes of past.

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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: saemark30]
#5224706 - 05/16/12 07:51 AM

again

the 152 mm F/8 use Chinese FK61 + Lanthanium and is in progress
the 140 mm around F/8-8.5 with FK61 and Lanthanium will come after the 152 and after we see in the 152 works everything fine
both made by same company

the 160 F/7.5 will use FPL 53 and comes from another company , estimated delivery time here is about 9 to 10 month from the start ( soon)

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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]
#5224786 - 05/16/12 09:28 AM

Markus do you have any idea of what the fee will be for the 152 mm F/8 use Chinese FK61 + Lanthanium in the cell to be able to retrofit to a synta type refractor ota.
Thanks
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]
#5224836 - 05/16/12 10:11 AM

I don't know Markus. I seems like at that length there would be no real need for the 140mm. If you got a mount that can handle a 140mm F/8 or 8.5, you might as well go for the 6". I don't know. Still might sell some if the price difference is big enough between the 140mm and the 6". Given the choice of the 2, I'll just have to see if I can use the 6" for visual on a CG-5.

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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: skyjim]
#5225567 - 05/16/12 05:26 PM

Jim,
the cell design for sale is made, price without adapter I get next week. If we see that we have enough customers for such project of same tubes we can make a ring cheap in china, if we get one by one slow order we will mashine it ourself, then it cost a bit more
so wait the price next week

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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]
#5225572 - 05/16/12 05:29 PM

Joe

the 152 weights 7 kg, I expect the 140 wll be around 5 kg

we have not nly the wait diffrence but also the length diffrence and so torsion arm

a 140 on a EQ 5 might work ok, a 152 will be to shaky

we will se ehow the 15e will be welcome in the market, then we decite to make the 140 if there is enough request

Post Extras:

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]
#5225810 - 05/16/12 08:12 PM

I think either will be marginal at best on an EQ-5. I think you will see that there is not much demand for a longer 140 if you have a great 6" already.

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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]
#5226022 - 05/16/12 11:08 PM

I think there should be enough of us with Atlas or CGEM mounts that would be interested in the 6".

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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: WarrenS]
#5226048 - 05/16/12 11:33 PM

7kgs {15.4 lbs} is just fine on a EQ5 head as long as you have fully extended 2" STEEL LEGS, the right wider flat hub with the lower set central hole that accepts a EQ5 head and a solid long dovetail bar in place. Any other leg+hub combo/dovetail bar won't work with the scope to kill the irritating shakes, i've tried them all.

I'm riding 23 lbs on my combo with a 6" f/8 achro OTA and it's close as you'll get to rock solid for most observer's taste in the field. Only 3 secs to settle down after you touch the focuser guys.

Markus's new 6" f/8 WILL work on a lighter mount based on the provided weight if you have the right combo of things in place. Go for the next step up for sure if you don't....

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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]
#5226151 - 05/17/12 12:43 AM

Thank you, Markus.
Jim

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saemark30
scholastic sledgehammer

Reged: 02/21/12

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

[Re: skyjim]
#5228605 - 05/18/12 04:12 PM

There is a need for 160mm and larger scopes using FPL-53.
Similar to FS-152.

Thanks Markus

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