.: Astrofotografía :.

[ManuelJ]

Supongo que ya sera una noticia vieja para algunos, pero por si acaso la comento, por si alguno no esta al tanto.

El señor Thomas Back ha diseñado un refractor triplete de 92mm F/7, totalmente fuera de su línea ED LZOS. Se trata de un tubo con un cristal comun, nada de ED ni fluorita. Por lo visto tiene una excelente correccion (evidentemente no como su serie normal) y su configuracion optica es totalmente inusual, y por lo visto va a revolucionar el mercado. Lo llama "brick", porque la lente frontal es practicamente plana.

Va a venir con el tipico microenfocador de 2 velocidades... pero ahora viene lo mejor... el precio: 699$!!

Atentos pues al BO/TMB 92mm F/7!




I think it is time to clear up a lot of guessing, misinformation, and give you more details about the TMB 92mm f/7 apo and other TMB products.

Here is an amazing quote from Roland Christen, about the new TMB 92mm f/7 "Brick"
design, that he is guessing about, and is wrong, I might add.

"These designs all use glasses that lie off the Abbe Normal line and are called abnormal dispersion glasses. There are a small number of glass types that qualify to some extent and
they are usually short flint and lantanum glasses."

The TMB 92mm f/7 does not use any short flint, ED, Fluorite, or SD glasses, such as the
Ohara FPL series. In fact, it uses glasses that are not available from any of the sources that Roland uses, and the triplet I designed has not one glass that lies off the normal Abbe line,
but only by just the smallest amount, like many common glasses. I find it rather assuming of Roland, and worse, to say what my design is, without knowing anything about it, other than
a short look at the objective, while I was not at my TMB booth.

This is indeed the low end version of the "brick" design, and because it is a design I have
not been able to find in any optical textbook, optical design book, or even the best optical designers say that it can't be done, as they also say in the optical textbooks too. Because of that,
the lens is patent pending, and will be patented all over the world, to protect us from anyone
cutting one open, measuring the glass types (good luck), and selling their version of my new lens design. It really is a new design under the Sun.

Using aspherics, which we have access to the same Zeiss 10+ million dollar aspherical polishing machine, that Zeiss is now installing at a very few optical shops, a newer version of the unit that made the last of the APQ fluorite triples, and an ion Beam milling polisher, we can not only hit very high wavefront null figures on our higher end Brick designs, but can
null the spherochromatism, and the lens will be color, coma, and spherically free at all the
visual wavelengths (1/10 wave or better).

Plus because all three elements have almost the same thermal coefficient of expansion, and
the glasses are not difficult it make in large sizes, we will bring out larger versions, first a 110mm, then most likely a 150mm, and the sky is the limit, as they told us they can pour up
to 60-inch blanks, of all three glasses.

The larger versions won't come out overnight, but the wait won't be too long. The 92mm f/7
will be coming out soon, and the price to performance ratio on the new TMB Brick
apochromatic lenses, will set new standards, in amateur astronomy.

I am also working on a FPL-53 triplet, that as we speak, is already finished, and when I test
the production samples, and if they pass my quality requirements, will go into production
very soon. The TMB/LZOS lenses will still be available, and will fit in well with these other lenses.

I think with the new lens designs I have come up with, and the new TMB eyepieces (more
designs to come), the future looks very bright for the amateur astronomer, that wants very
high quality apo refractors, very high quality eyepieces, that set new price to performance
ratios, unmatched by any other telescopes and eyepieces.

Any problems with the first BO/TMB Planetary eyepieces, are now fixed, and if yours is
still not as good as you feel it should be, please contact Bill or Tammy Burgess at Burgess Optical, as they can update your eyepiece to the highest standards, or you can get your money back, and we will pay the shipping too. We want to make everyone happy with their BO/TMB and TMB purchases.

As soon as I have more information on these new telescopes, and when they are ready for
production, you can find out more on the TMB Optical and Burgess Optical web sites, and
our Yahoo groups. Also, Astronomics and High Point Scientific will be our dealers in the
US, and will also have up to date information too. Thank you for listening, and for your
interest in my new TMB products.

Sincerely,

Thomas M. Back
TMB Optical

[nandorroloco]

Hey!!! parece un buen invento.... bueno, bonito y barato....
Buenas cámaras, buenos telescopios, buenos cielos y... buenas noches!!!

Saludos.
_________________
LXD75 N-6EC, WO ZS80IIED, ETX70AT,
SPC900, Canon 350d (mod), Canon 400d, adaptador M42-EOS
Cosinon 50mm, Takumar 100mm, y Sigma 200mm todos m42 (de rosca)
Cosina 100-400 AF

[Madmartigan]

a ver que tal funciona el invento ese

PD:que pasa Nando...¿ya te vas pa cama?
por aquí creo que hoy estará buena la noche para hacer de "paparazzi"
_________________

[Maxi]

Yo en el momento que se vaya el sol, ya estoy sacando el cobertizo del teles para que la la temperatura de tubo se vaya igualando con la de ambiente por aquello de las turulencias

Saludos
_________________
ASTROMODELISMO

http://www.telefonica.net/web2...../index.htm

[nandorroloco]

No, no me voy a la cama... hasta que haga alguna de las mias... fotos... pero es que no me he podido resistir a escribirlo.

Me parece muy interesante esto que explica.... Un descubrimiento así.... no se puede ocultar al mundo!!!

Saludos.
_________________
LXD75 N-6EC, WO ZS80IIED, ETX70AT,
SPC900, Canon 350d (mod), Canon 400d, adaptador M42-EOS
Cosinon 50mm, Takumar 100mm, y Sigma 200mm todos m42 (de rosca)
Cosina 100-400 AF