A budget Plossl eyepiece offering excellent performance. We have tested these eyepieces and found they offer a distortion free view and excellent image quality across the entire field of view. They can be used with scopes down to F5 focal ratio.  In common with more exotic eyepieces, they feature high grade multi-coating, blackened lens edges and a rubber eye-gaurd.

We recommend these as an excellent value low cost eyepiece.

Specification

32mm Focal Length

1.25" Barrel Size

52° Apparent Field of View

1 Year Warranty

A budget Plossl eyepiece offering excellent performance. We have tested these eyepieces and found they offer a distortion free view and excellent image quality across the entire field of view. They can be used with scopes down to F5 focal ratio.  In common with more exotic eyepieces, they feature high grade multi-coating, blackened lens edges and a rubber eye-gaurd.

We recommend these as an excellent value low cost eyepiece.

Specification

40mm Focal Length

1.25" Barrel Size

46° Apparent Field of View

1 Year Warranty

The Pierro Astro Atmospheric Dispersion Corrector has been a revolution in observing and imaging objects. Through the use of 2 high quality minimum 1/10 Lamda silicate prisms, it corrects the false colour introduced by the earths atmosphere. When used for Planetary imaging it changes the clarity of the image dramatically, particularly in the Luminence channel when LRGB imaging.

As with previous versions of the Pierro Astro ADC the MkIII has an extended bandwidth range to 300nm. This makes it highly suitable for imaging Venus and other targets in the UV wavelength range. Compared to cheap far eastern ADC's the transmission quality of the PA-ADC is significantly higher. This is very important for Venus imaging as sensors and coatings are already very restrictive at sub 400nm wavelengths.

As the MkII before it, the prisms in the new MkIII are also more powerful allowing for correction of dispersion at lower elevations compared to the previous model. A new feature of the MkIII is a modification to the prism adjustment. Instead of two levers which must be moved equally, the new MkIII now only uses one lockable lever which adjusts both prisms simultaneously. This makes setting the optimum correction much easier.

Since the introduction of the Pierro Astro ADC, its design has been copied and now there are other, cheaper ADC's available. Do not be fooled by these cheap imitations! The Pierro Astro ADC has system accuracy of L/10 (not just a claimed accuracy for one prism surface) and uses high efficiency fused silica prisms with optimised coatings. The cheaper competition uses BK7 prisms and are at least 20% less efficient at UV wavelengths than the Pierro Astro ADC. Very importantly now the planets will be lower in the sky for many years to come, the Pierro Astro ADC has 2.5 degree prisms instead of the common 2.0 degree. This means more adjustment of dispersion is possible on low altitude objects.

We firmly believe the Pierro Astro ADC is the best non-professional dispersion corrector available on the market today.

Specifications

Threads T2 Male and Female

Dimensions TBC (HxD)

Optical Aperture 24mm Usable

Optics 2 Prisms

Deviation Angle Edge 2,5 Degrees

Surface Accuracy 1/10 ptv

Anti-Reflective Coating FMC Reflection of 0.5 percent 300-700nm (ADC-UV)

Lateral Surface Blackened for improved contrast

Substrate High quality fused silica, transmission: 170nm to 2500nm (transmission of prisms also depends on anti-reflection coating)

The Pierro Astro T2 Barlow adapter is a very useful accessory. It has male and female T2 threads. In addition it has an internal thread to allow for the direct connection of a Televue Powermate (2.5x and 5x). For 1.25" lens cells there is a 1.25" space which allows for the internal fitting of a 1.25" cell which is then secured with two plastic grub screws.

The T2 Barlow adapter was designed to compliment the Pierro Astro ADC. Using it permits easy connection of Barlows or Powermates to the ADC while allowing the whole assembley to be connected via T2 instead of a 1.25" eyepiece clamp. Some examples of how the adapter can be used are shown above.

A consideration when using some Barlows or a Powermate with the ADC is the effect adding in the length of the ADC (approx 30mm) has on the magnification of the Barlow / Powermate. Powermates have quite a narrow range at which they work at the quoted magnification. Outside of this they will over magnify. This is a particular issue with the 5x. For some Barlows like the APM 2.7x ED Barlow, the barlow has a specific back focus distance at which point it provides a corrected image field and optimum performance. Baing able to mount the barlow very close to the ADC is therefore useful to allow back focus to be adjusted as needed.

This illuminated multi-function guiding eyepiece features a laser etched double crossline reticle with a built in battery illuminator. The eyepiece is a multi-coated 12.5mm with an apparent filed of view of 40 degrees.

Specification

Focal Length 12.5mm

Field of View 40mm

The APM 24mm Finder eyepiece is a designed for use with all APM finders. It features a reticule which can be illumitated with the optional illuminator.

Specification

Focal Length 24mm

Field of View 55 degree

Visual Back T2 to 1.25"

If you wish to attach eyepieces or other accessories with a 1.25" barrel to an existing T2 thread then this adaptor is for you. It also features an additional T-2 Male Thread. This then allows you to attach T2 extension tubes and then use the adapter for eyepiece projection.

Adaptation on the telescope side T2 female (M42x0.75)

Adaptation on the eyepiece side 1.25" with brass compression ring and two locking screws or via T2 male thread

Finish Black anodized

Length 15mm (not including rear thread)

T2 Adapter which screws into a Hyperion, Morpheus or APM UFF eyepiece thread (M43) and provides a T2 thread for T2 camera mounts

The benefit to being able to mount you camera body directly to the eyepiece for projection photography is that it allows you to make use of the additional magnification an eyepiece offers over prime focus setups. It will also provide much better results than Afocal photography. Afocal is when you use your cameras lens to focus on the image in the eyepiece

T2 Adapter which screws into the end of APM or Lunt 100° Eyepieces to provide a T2 thread. This adapter features an M44.5 female thread which converts to a T2 (M42x0.75)

The benefit to being able to mount you camera body directly to the eyepiece for projection photography is that it allows you to make use of the additional magnification an eyepiece offers over prime focus setups. It will also provide much better results than Afocal photography. Afocal is when you use your cameras lens to focus on the image in the eyepiece.