Pentax
Refraktoren von PENTAX
Pentax refractors are specialists for one thing above all: They are excellent optics for photography. In addition, the refractors have a very large field of view which is free of aberrations - even without additional field flatteners. This was certainly a convincing argument for Pentax refractors, especially if you think of the always-increasing chip-size of modern digital cameras.
Orion Nebula, taken with Pentax 75 SDHF in prime focus: Baader modified Canon EOS 40D, 15 x 30 sec (640ASA) and 10 x 150 sec (800ASA). © 2011 W. Paech
Unfortunately, PENTAX has completely stopped the production of astronomical refractor telescopes. Unfortunately, we cannot order any parts, nor do we have any remaining telescopes in stock.
We are still producing adapters from Baader Planetarium for the Pentax system. With the Baader M68 system we offer an adapter solution for the eyepiece side of Pentax refractors, which allows the use of the complete range of Baader accessories.
On our www.baader-planetarium.de website we had a presentation of the PENTAX refractors, which we would like to make available to you here as a reference in PDF form (sorry, German language only).
(Größe: 5.4 MB)
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Most Recent Product Questions
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Rated: 0
6/13/2021 7:52 PM
2" BDS-SC Baader Diamond Steeltrack® Focuser
Hay espacio suficiente entre Telescopio y Horquilla para sustituir el microenfocador de Meade en un LX600 de 14" por 2" BDS-SC Baader Diamond Steeltrack Focuser?
Answer rated: 0We do not know the Meade dimensions, but the minimum height of the SteelTrack SC as supplied (incl. 2" clamp) is 93 mm.
The minimum height with optional S58 direct-thread adapters is 80 mm.
You can find the dimensions in this PDF: https://www.baader-planetarium.com/en/downloads/dl/file/id/29/product/2856/bds_sc_dimensions_technical_drawing.pdfAnswer by: Baader Web Team (Admin) on Jun 14, 2021 11:54:00 AMRated: 0
6/9/2021 2:33 PM
Alan Gee Telecompressor Mark II (T-2 part #20)
Hello! Does he correct coma?
If you screw it to a diagonal mirror, will it cover the entire APS-C matrix?
I have a Meade 8 "lx90 telescope. Thank you.
Answer rated: 0Unfortunately this will not work. The Alan Gee is not correcting the Coma of your telescope and will not cover the entire APS-C matrix when screwed into the diagonalAnswer by: Baader Web Team (Admin) on Jun 9, 2021 3:47:00 PMRated: 0
6/4/2021 2:02 AM
Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
I would be thankful for some help in choosing parts to attached my Nikon Z7 camera to an old Celestron Ultima 11 telescope equipped with a Celestron off-axis guider. Starting from the camera (flange distance 16mm) I' believe I would need a Baader t-ring adapter #2408335 (8.3 mm) and a M48 adapter #2958552. I would screw this directly to the Celestron M48 adapter which comes with the OAG (12.5 mm). Next would come the OAG itself (29 mm).
I have already ordered the Baader Click-lock adapter #2956233 to replace my existing visual back (53 mm). If my math is correct, this adds up to 118.8 mm. My original Celestron Manual states that the back focus distance at f/10 from the primary mirror baffle tube is 151.765 mm. This means I need to provide additional spacing of 32.965 mm that I am not sure how to get. Would I want to add this before the OAG rather than after the OAG in order to keep the distance from my OAG prism to the camera sensor at a minimum?
Answer rated: -1An extender 32mm long with 2" thread whould be helpful, unfortunately we don´t have such. Instead you could use a #2956220 ClickLock
screwed directly onto the OTA:
https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html
https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/72/3/baader-2-clicklock-eyepiece-clamps-from-t-2-to-41-2df.jpg
It is slightly too long, 47mm minus the 7mm thread from OTA, but a f/10 ratio optic like a SCT is tolerating it.
https://www.baader-planetarium.com/en/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html
Now you can put on your set-up as usual and the camera and guiding camera are staying common.Answer by: Baader Web Team (Admin) on Jun 4, 2021 12:49:00 PMAnswer rated: -1Thank you very much for the helpAnswer by: Dr. Robert Nick on Jun 4, 2021 4:12:26 PMRated: 0
6/3/2021 10:11 PM
Baader UFC (Universal Filter Changer)
I have a Celestron Nextstar Evolution 9.25" SCT with the Celestron 2" Dielectric Star Diagonal (Celestron #93573). The star diagonal has an adapter allowing it to thread directly onto the back of the telescope.
I'd like to thread the Baader Universal Filter Changer (UFC) to the back of my telescope, then thread the star diagonal to the UFC. In the UFC I'd like to use both 1.25" and 2" filters. Could you please provide the required part numbers for this configuration? Also, anything else I should consider or be aware of?
Answer rated: 0There are at least two ways to realize it.
First you can screw on the OTA a #2956220 SC ClickLock
https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html
Then as an unit following parts (in the row from OTA to the diagonal):
https://www.baader-planetarium.com/en/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html
https://www.baader-planetarium.com/en/baader-ufc-s70--2%22-adapter-2%22-sc-thread-(f)-telescope-sided.html
https://www.baader-planetarium.com/en/baader-ufc-base-(filter-chamber)-telescope-sided-s70-dovetail-receptor.html
https://www.baader-planetarium.com/en/baader-ufc-2%22-sc-adapter-2%22-(m)-camera-sided.html
Optionally a second CLickLock 2956220 when using the diagonal with the 2" barrel.
Now you can put on and off the UFC in one piece to be more flexible.
Second way:
https://www.baader-planetarium.com/en/baader-2%22-nexstar-locking-ring..html
https://www.baader-planetarium.com/en/baader-ufc-s70--2%22-adapter-2%22-sc-thread-(f)-telescope-sided.html
https://www.baader-planetarium.com/en/baader-ufc-base-(filter-chamber)-telescope-sided-s70-dovetail-receptor.html
https://www.baader-planetarium.com/en/baader-ufc-2%22-sc-adapter-2%22-(m)-camera-sided.html
The NexStar Locking ring is neccessary otherwise the 2" SC thread from OTA is intrusing too deep into the UFC base
Filter slider for 2" filters:
https://www.baader-planetarium.com/en/baader-ufc-2%22-(m48)-filter-slider.html
And for the 1,25er :
https://www.baader-planetarium.com/en/baader-ufc-d-50.4-filter-slider.html
https://www.baader-planetarium.com/en/baader-ufc-1%C2%BC%22-aux-filter-holder-(requires-2459113).html
I´d say to stay with 2" filters because you can use the diagonals 2"/1,25" reducer so you´re able using 2" filters
with 1,25" eye pieces. For some reason lots of customers regret to buy 1,25" filters and wanting it later in 2".Answer by: Baader Web Team (Admin) on Jun 4, 2021 11:55:00 AMRated: 1
6/3/2021 11:33 AM
Baader K-Line Filter 1¼" (double stacked)
Why are there no Baader K-Line 2 "(double stacked) filters?
Answer rated: 01. because the price would become prohibitive - in the range of €1000.-
2. because the filter cell would need to be ~ 12 mm high - a killer criterium for most users as there is not enough space in the optical train.
3. since lucky imaging cameras have small chips - not needing larger filterrs than 1 1/4"
4. BECAUSE WE ÀBSOLUTELY DO NOT WANT TO SUPPORT LOOKING AT THE SUN IN UV-LIGHT !!!Answer by: Baader Web Team (Admin) on Jun 4, 2021 1:27:00 PM