Baader Afocal Digital Projection System (ADPS) - (versions I to VII)

£55.00
SKU 2458071

Availability: Anticipated Dispatch in 7-10 days

  • ADPS – Afocal Digital Projection System
  • For digital imaging with cameras and/or camcorders
  • Consist of base version ADPS (single parts see ADPS IV) and additional lens sided adapters on other ADPS versions
Description

The Baader Afocal Digital Projection System (ADPS) is for eyepiece projection applications (so-called afocal projection). The system is made of a very finely stepped series of extension rings (and a T2 locking ring) to adapt it to any 1¼" eyepiece (with a body diameter of up to 38 mm), so that the eyepiece can be positioned as close as possible to the camera lens. This close distance makes a sharp image without vignetting possible.

The system is very similar to the Baader OPFA system for DSLR cameras, but the distance between the projection eyepiece and the lens of a digital camera can be set to a much shorter value.

The core part (base system) of the ADPS system, which is referred to as Version IV, consists of the following items 

  • focuser/eyepiece holder (T-2 part #24),
  • rotation counter ring,
  • 2x T-2 tube 15mm (T-2 part #25A)
  • T-2 barrel (T-2 part #25C)

ADPS Schematic Example

The central component of all ADPS systems is a sliding focuser (#2458010; marked in blue on RHS) with a T2 locking ring. A 1¼-inch projection eyepiece (not included in the ADPS) is inserted into this sliding focuser, and the sliding focus allows precise adjustment between eyepiece and camera lens.The locking ring allows the camera to be rotated continuously relative to the focuser in order to optimally position the camera for an image.

Then, three T-2 extension tubes (2x15mm and 1x7.5mm, also marked blue) are screwed onto the sliding focus, the eyepiece (with a maximum outer diameter of 38mm) is now inside of the tubes. These tubes are used to achieve the correct projection distance. In addition, you need matching DT I adapters and the DT ring to connect your camera to the ADPS. 

To create the other (six) versions of ADPS, there are simply 6 telescope-side adaptors that are screwed onto the (telescope side) part of the above system. ADPS are all built like the one in the above example (from right to left). The blue marked parts correspond to the core/central part of the system - which is ADPS-IV base version with male T-2 thread on the camera side and a female T-2 thread on the telescope side. The adaptors on the telescope-side which are marked green in the figure are included in the scope of delivery of ADPS I-III and ADPS V-VII (ADPS I and ADPS II are shown in the example). The parts marked in red are not included in any ADPS!

Versions

In the table below, we present the 7 versions of the ADPS.

Baader ADPS Version I ADPS Version I
  • Consist of base version ADPS (single parts see ADPS IV)
  • Telescope side with 2" barrel (T-2 system part #14 2458155)
Baader ADPS Version II 2" ADPS Version II
  • Consist of base version ADPS (single parts see ADPS IV)
  • Telescope side with 2" barrel (T-2 system part #16 2408150)
Baader ADPS Version II with SCT Adaptor ADPS Version III
  • Consist of base version ADPS (single parts see ADPS IV)
  • Telescope side with SCT Adaptor (2958500B)
Baader ADPS Version IV with T-2 Adaptor ADPS Version IV - BASE version
  • This is the unit that is the "central" main supplied part for the other versions I-III and V-VII
  • Consist of focuser/eyepiece holder (T-2 part #24), rotation counter ring, 2x T-2 tube 15mm (T-2 part #25A) and T-2 barrel (T-2 part #25C)
  • Telescope side with T-2 inner female thread.
Baader ADPS Version V with Zeiss M44 adaptor ADPS Version V 
  • Consist of base version ADPS (single parts see ADPS IV) 
  • Telescope side with Zeiss-M44 Adapter (T-2 part #13 1508005)
Baader ADPS with Vixen M43 Thread adaptor ADPS Version VI
  • Consist of base version ADPS (single parts see ADPS IV) 
  • Telescope side with Vixen-M43 thread Adaptor (T-2 part #22 1508037)
Baader ADPS Version VII with M36 Screw Adaptor ADPS Version VII
  • Consist of base version ADPS (single parts see ADPS IV) 
  • Telescope side with M36.4mm screw thread adaptor Vixen, NexStar, TAK (T-2 part #3 1508039)

 

Specifications
OPTICAL LENGTH (MM) variable
USAGE afocal eyepiece projection
CAMERA ADAPTABLE For digital imaging with cameras and/or camcorders
INNER DIAMETER / CLEAR APERTURE (MM) 38
OUTER DIAMETER 55,0
TYPE OF ADAPTER Camera Adapter, Extension

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