- Included items
The Sharpstar Z4 is a professional 100mm apochromatic flatfield Petzval sextuplet with a fast focal ratio of f/5.5 and a corrected field of 36mm in diameter, making it the perfect match for APS-C cameras.
The Sharpstar Z4 includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration.
Differently from standard ED refractors, the Sharpstar Z4 features a Petzval design that does not require to set the sensor to a specific distance to the last lens. That leaves the freedom to use any filter wheel, any off-axis guider or accessory without any worry to calculate the correct distance from the flattener.
With a 36mm image circle and a focal ratio of f/5.5, this is the perfect astrograph for imaging with APS-C and smaller sensors. The large rack and pinion 3.4" focuser can be rotated 360° to perfectly frame the subject and it has a reduction gear of 10:1 for precise focusing. Its long travel distance allows use as a visual instrument as well as a capable astrograph. The Z4 is natively compatible with the Prima Luce Lab Sesto Senso 2 robotic microfocuser.
All the lenses are fully multi-coated and the tube is internally flocked to reduce reflections and absorb stray light. The tube is made of CNC-machined aluminium, the rack and pinion focusing mechanism of brass and the mechanical components are engineered to provide the best rigidity, performance and durability.
|Optical design||Apochromatic Sextuplet air-spaced|
|Objective diameter||100 mm|
|Focal length||550 mm
|Resolving power||1.38 arc seconds|
|Stellar limiting magnitude||12.7|
|Max. magnification||250 x|
|Light gathering power||204.08 times the human eye|
|Mount attachment||Vixen style dovetail plate (300 mm long)|
|Focuser||Rack & pinion dual speed (10:1) 3.4" diameter|
|Included connection adapters||M86 x 1, M68 x 1, M54 x 0.75, M48 x 0.75|
|Backfocus||123 mm (from the base of the M86 thread)|
|Tube weight||4.3 kg (including tube rings and dovetail bar)|
|Tube diameter||112 mm|
|Dew shield diameter||125 mm|
- Sharpstar Z4
- Clamshell tube ring
- 300mm Vixen style dovetail bar
- Multifunctional carrying handle
- Adapter M86 x 1 to M68 x 1
- Adapter M68 x 1 to M54 x 0.75
- Adapter M54 x 0.75 to M54 x 0.75
- Adapter M54 x 0.75 to M48 x 0.75 with 2" filter thread