2" Research Grade TZ-3 Telecentric System (3x focal length)

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2" Research Grade TZ-3 Telecentric System (3x focal length)

# 2459257

€ 445.00 Price excl. German VAT tax (19%): € 373.95

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  • Research Grade Telecentric Unit, featuring an oversized pick up expanding lens set and 2" (50.8mm) threads on both sides – T-2 Adapter and 2" m/f inverter ring are both included as standard accessories
  • 46mm clear aperture at the H-alpha-filter entrance side - suitable for research grade SolarSpectrum H-alpha filters
  • Large working distance of 250mm for optimized focal length reduction with a telecompressor and suitable room for adapting a binocular viewer
  • Aplanatic, with 3x focal length extension to achieve a parallel f/30 beam in conjunction with ~f/10 optics systems – free of field curvtare
  • Primarily calculated and produced for H-alpha at 656,3 nm, delivering 99% Strehl (definition brightness) depending on the used telescope system
  • Diffraction limited design with about 80% Strehl also at 396 nm (CaK)

Product Questions and Answers

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A couple of followup questions. 1) I noticed the TZ-3 tube has 3 'sections' longest being in front, shortest at rear holding 'collimation'/'pickup' lens and a middle section that appears to be just a spacer. Can the middle section be removed (omitted) such that rear lens becomes closer to front 'input' lens.
2) Is the middle section intend for removal to provide for an alternate closer location of pickup lens or is this just a manufacturing convenience to be a separate part (reuse of existing parts?)?
3) What would be the characteristics of the resulting output beam? Diameter, F#, impact on position of TZ relative to main objective (assume that would not change), impact on distance from TZ to final focal plane which was originally 250mm?
Question by: Anthony Sarra on Mar 12, 2017 8:05:00 PM | 1 Answer(s)

Rating of Question

25
Can the Baader Telecentric lenses be used like ordinary Barlows, e.g. for visual observation or imaging (from UV to IR) of the planets?
Question by: Jack on Feb 10, 2017 7:21:00 AM | 1 Answer(s)

Rating of Question

19
Other than the obvious differences in magnification and position of the focal spots, is the TZ3 significantly different from the TZ2 ? I currently have a TZ2 on a home-built Halpha system and it is giving great results but I'd like a little more magnification. The TZ3 seems to have a different appearance than the TZ2 and TZ4 and is marketed toward SolarSpectrum etalons. Is there anything special about the TZ3 that makes it significantly different from the TZ2 and TZ4 ?
Question by: Bob on Aug 24, 2021 2:33:00 AM | 1 Answer(s)

Rating of Question

12
Which side goes into the telescope and which goes into the solar filter? I assume the side with the small lens needs to face the telescope, and the side with the large lens should face the H-alpha filter / camera. Is that right? I find that counter-intuitive, because the cone of light should be wider on the telescope side, is that not so?
Question by: Florin Andrei on Dec 1, 2020 3:52:00 AM | 1 Answer(s)

Rating of Question

6
1. What is the main difference between "Research" TZ-3 and regular TZ-4 other than magnification ratio?

2. Second difference I can spot - I see that TZ3 is optimized for 2 lines, while TZ4 is only for 1 line. Is it difference only on coatings or optical design too?

3. Should I expect same high quality when using TZ4 at Ha as on TZ3 at Ha?

4. I can also see that case is different. Is there any reasoning/causes for that? I see that TZ3 fits in 2" focuser, while TZ4 has weird shape and can only be mounted by the thread, or I am missing something.

Best regards,
Mikhail
Question by: Mikhail on Nov 27, 2018 6:38:00 PM | 1 Answer(s)

Rating of Question

-2
If using the TZ-3 with a 32mm CA SolarSpectrum ASO model is some light lost since the TZ-3 is designed to produce a 46mm output beam? If 'yes', light is lost, when used with a 32mm etalon can the rear lens of TZ-3 be moved closer to the front / input lens to produce an exit beam more closely matched to the 32mm CA of the ASO model Ha filter and thus produce a brighter image in an eyepiece?
Question by: Anthony Sarra on Mar 12, 2017 7:25:00 AM | 1 Answer(s)

Rating of Question

-7
1) From an optical standpoint, what happens if the backfocus distance on the telescope is too short and the focal point lies in front of the marking on the TZ-3?
2) In that case, what amount of deviation from the specified 86mm distance would you consider acceptable when working with a 700mm F8 reflector and a 0.7Å+-0.05 etalon?
Question by: Robert on Apr 22, 2022 1:28:00 PM | 1 Answer(s)

Rating of Question

-10

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