This is what our customers say...


“Observatory of the Ural Federal University bought a new 600 mm telescope in 2016. Dall-Kirkham system with a 2-lens coma corrector. German type equatorial mount with absolute Renishaw encoders and direct drive motors. For control of telescope used a controller by “Sidereal technology”, which allows work with Windows and Linux. The manufacturer’s specialists carried out assembly and installation. The quality of the telescope manufacturing is very high and satisfy our requirements. I can recommend cooperation with JTW-Astronomy, formulate your technical task in detail and according to your climate.” - Principle engineer V. Krushinsky.

L200 Spectroscope

An article about Spectra-L200 by Mark Trypsteen, a Belgian pharmacist and astronomer

GuideStar 09-2014, in Dutch

An overview of Spectra-L200 by Sean Walker, S&T's Equipment Editor specializing in astrophotography, solar system observing, and astronomy gear.

Sky & Telescope 11-2014

"Just to let you know the L200 has arrived safely. I must complement you on the quality of the engineering, just fantastic" - B.S.

"Yes, certainly happy with the L200 & no issues, but not so happy with the weather which has limited use" - R.G.

"Very much enjoying the L-200. All cloudy off course, but there is so much to learn wink emoticon" - A.B.

"Yes the unit has arrived! And a really nice unit indeed. Love the finish." - B.P.

"I was impressed by the professional build quality of the L200 incl. the very nice and user-friendly reflective slit." - P.D.

"The cases are excellent, and the new neon drivers also arrived safely" - J.W.

"Thanks again, this spectroscope is certainly very well built. Your crew has done a great job." - J.M.

"I was surprised about the well-made instrument and the kind support by Mark. So, the L200, made by JTW Astronomy, is for me fully recommend!" - H.R.

"I wanted to let you know I received the new PCB board and it all works great. Thanks!" - G.S.

Camera modifications & repairs

"Camera turned up and everything appears to be working normally! Thanks so much for the quick turn-around. Looking forward to getting it out under some dark skies now!" - N.B'

"Thank you very much Mark for all your work. Take care!" - M.T.'

"Thanks very much for getting this fixed for us, we appreciate your efforts." - S.P.

"Thank you so much Mark, that was very helpful! I really appreciate that you took the time to answer in detail. Now I understand what's going on and can answer other peoples questions about the mod. Thanks!" - M.A.

"I am attaching some photos taken with the Sony ... it works great!" - S.L.A.

"Amazing, thanks so much." - J.H.

"Fantastic news, we appreciate your help and hard work on this." - L.P.

"That is just amazing. I agree. Very exciting. I definitely think we should pursue this project as the results are also better than I hoped." - M.L.

"I really appreciate your detailed response especially on a Sunday!" - G.W.