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Posts Made By: Markus Ludes

May 17, 2004 07:59 AM Forum: Coronado-Lunt-DayStar Solar Filters

What's the Difference? MS40+BF5 vs MS40+BF10

Posted By Markus Ludes

from our experience the BF 10 in the Maxscope offers a wide better more homogeneity field than with BF 5, images all over the sun looking better than with BF 5


June 29, 2004 02:22 AM Forum: Eyepieces

Sky & Tel Article: TMB Monos

Posted By Markus Ludes

Hi All

I see the customers talking here do not have any input, so let me give some input

1, blackened edges: Blackened egdes are necassary only, in not well baffled, fiedlstopped eyepieces. ZThe famous Zeiss Abbe Orthos does not have either a balackened edge and it does not help or improve anything in the TMB Monos due the perfect baffling. I know many eyepieces with blackened edges and ghosting images or reflections

2,3 total runs of eyepieces have been made so far , abouu 3000 pc in total. In first run about 10 pc showed a optical problem and unsharp fieldstops. In second run about 2 or 3 showed a optical problem and a handfull still a fieldstop not total perfect round
In third run, non of the eyepieces have had either a optical or a fieldstop deffect. This is a sign of a great improvement of the manufactor. Also take into account from 3000 eyepieces, about 30 pc showed a problem, most of them in first run, a few in second run , non in last run, but even in total this is about 0.1%, in a big serial production anybody would he happy to have so small quantitys blames.

Also the TMB Mono prooved already all over the world, to bet visible the famous Zeiss and Pentax orthos, reviewed by hundrets of users. Now a reviewer of a magazin comes using a fast reflector with attached comacorrector to review a high end planetary eyepiece. Anybody who is doing serious planetary Observing knows he need a, a high quality telescope, b, a very good seeing, c, a perfectly 100% collimated telescope. Anybody who owns a F/4.5 newton knows how extremly difficult it is to get and also hold such telescope in perfect collimation.
Under less then perfect overal conditions, nobody can see the diffrence between a standart quality and highest quality item.

All this is of course no excuse that 3 bad eyepieces have gone to a magazin review, but we talking about 4 pc total found yet from second run, which showed a problem and non of last run.

The chance was till the second run to get a poor eyepiece by 0.1%, the chance after third run so far is 0,0 %

Take such test telescope and compare a cheap chinese Plössl for $ 20 against a $ 80 Tele Vue Plössl and you may not see any diffrence.
But if you use a excellent Planetary telescope, excellent collimated, under excellent seeing, then you see a diffrence, for shure.

Sky and Telescope did with this review a excellent job to protect the market for one of here biggest advertiser, but this method is very coman in all magazins, you get what you pay for, this is also valid for advertisers. Pay a premium each month and you get many and positive reviews, pay small or nothing and you get kicked into the ass


January 19, 2005 06:53 AM Forum: APM

New TMB 6

Posted By Markus Ludes

next image


January 29, 2005 05:13 AM Forum: Refractors

90mm Short tubr APOs

Posted By Markus Ludes

we getting this year 30 pc TMB 95 mm f/7 Triplets


February 10, 2005 08:47 AM Forum: APM

553mm Apo?

Posted By Markus Ludes

The scope with German Equatorial Mount cost about US $ 690,000, we making all mechanics and goto mount here in germany, delivery time 2 years


February 17, 2005 09:06 AM Forum: APM

TMB 115 Images

Posted By Markus Ludes

Like to post some new actual images recently made by a customer of mine with his new TMB 115F/7 Apo

clear skies


February 28, 2005 09:17 AM Forum: Zeiss

Prism vs mirror diagonal in APQ's

Posted By Markus Ludes


usual the APQ have been designed to be used with the Zeiss M44 diagonal prism. If you use in this modells a stardiagonal mirror, you will see quickly the differenc,e by getting color and some sphericla aberration. Recently I have seen also so APQ which have been designed for mirror use, not prism use.

There is no info on the optics which is for what designed, only a quick startest will show it

best wishes

March 15, 2005 07:04 AM Forum: Coronado-Lunt-DayStar Solar Filters

April 2, 2005 01:46 PM Forum: Refractors

Decided to get 4" APO...Should I sell the 4" F15?

Posted By Markus Ludes


there is no reason to keep the 4"F/15, the chromatical aberration even if small damaging faintest planetary detail against a apo. Since you know the long focuse scope now, dont get a to short focuse apo for planetary observing, keep at F/8 to F/9 as apo and you will enjoy it more then your 4"F/15 achromat

good luck in your decision

April 25, 2005 11:23 AM Forum: Equipment Talk

Replacement Focuser for Synta

Posted By Markus Ludes

how about the new 2.5" dual rate Moonlight focuser, designed for APM ?