ASKAR 65PHQ APO QUINTUPLET f/6.4
Askar
Apochromatic Petzval quintuplet
2.8 kg
ASKAR 65PHQ APO QUINTUPLET f/6.4 is backordered and will ship as soon as it is back in stock.
The Askar 65PHQ is a professional apochromatic flatfield Petzval quintuplet with a focal ratio of f/6.4 and an image circle of 44mm in diameter. The Askar 65PHQ includes two Extra Low Dispersion glass elements for superb correction of chromatic aberration.
Differently from standard ED refractors, the Askar 65PHQ 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 large 44mm image circle and a focal ratio of f/6.4, this is the perfect astrograph for the advanced astrophotographer. The large rack and pinion 2.5" focuser can be rotated 360° to perfectly frame the subject and has a reduction gear of 10:1 for precise focusing.
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.
Specifications
| Optical design | Apochromatic Quintuplet air-spaced |
|---|---|
| Objective diameter | 65 mm |
| Focal length | 416 mm |
| Focal ratio | f/6.4 |
| Resolving power | 1.78 arc seconds |
| Stellar limiting magnitude | 11.76 |
| Max. magnification | 162.5 x |
| Light gathering power | 86.22 times the human eye |
| Mount attachment | Vixen style dovetail plate (300 mm long) |
| Focuser | Rack & pinion dual speed (10:1) 2.5" diameter |
| Included connection adapters | M68 x 1, M54 x 0.75, M48 x 0.75 (with 2" filter thread) |
| Backfocus | 130 mm (from the base of the M68 thread) |
| Tube weight | 2.8 kg (including tube rings and dovetail bar) |
| Tube diameter | 80 mm |
| Dew shield diameter | 88 mm |
| SKU | AS-65PHQ |
Included items
- Askar 65PHQ
- Pair of tube rings
- 300mm Vixen style dovetail bar
- Carrying handle
- 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
- Manual
Gallery
Customer Reviews
Taking advice from those experienced in the hobby, I sought a wide field telescope as an entry to photography. The Askar 65PHQ definately fit the bill. It is compact, and easy to move outside and setup - thus it gets used often. It is very easy to set up and get correct focus. I have my scope teamed up with AM5, ASIair and a ASI2600MC. The raw unstacked 300s subs are a sight to behold. Sharp stars to the edge of the flat field. Even stacked unedited images are high quality (NGC 3372 attached pre and post editing). All images were based on 60 x 300s exposures, in full moon (didnt want to wait after all the cloudy weather). I used Antlia RGB Triband filter for Lagoon and Prawn Nebulae, and Optolong L Ultimate for the Carina Nebula. I used the dedicated 0.75x reducer to get the right FOV for Carina.
Highly recommended scope.
I was after a wide field of view to get some of the larger objects and looked around everywhere. After reading some reviews (not many out there), I settled on the Askar 65PHQ. At 416mm there is no need to worry about back focus, but you do have to attach the provided adapters. The quality of the optics and the Petzval design resulted in amazing shots with stars looking wonderful. Great service from Testar and Jamie as well. I am very impressed with Askar and will look at upgrading to a larger size when “Aperture Fever” hits me again. This shot of NGC 3372 and M8 Lagoon, both only 20 x 180 with my ASI533MC and dual band filter. I basically just stacked it (no calibration frames) and did no processing at all to give you an idea of what the Askar 65PHQ can do. If you do some software processing and tweak the images, it will look even better. I’m in Bortel 4 and there was almost a half-full moon. This scope will be great fun to experiment with other cameras and filters. It matches really well with the ASI533MC, but I get the feeling it would be great with an APS-C, like an ASI 2600. I am definitely keeping this scope.
I've had my Askar 65PHQ for about 6 months now, and it's nothing short of amazing. Having owned a number of beautiful refractors in the past (Tak FSQ85, TMB 80/480, APM 115 and TMB/LZOS 132), the scope had big shoes to fill, but as this was my step back into astrophotography after a 10 year break, I wanted 3 things - Small and manageable size, wide field of view, Petzval design optics not requiring flatteners and backfocus adjustment. The 65PHQ ticks all of those boxes, and somehow, at this price point, is easily on par with any of my previous refractors optically..
I chose to pair the scope with Prima Luce rings, spacers and dovetails to meet all of my equipment mounting requirements and a ZWO EAF finishes the rig nicely...
I'm using the scope with a IMX294 based sensor on a Losmady G11G and thus far - I love it!
I'll be getting the 130PHQ next!
Couldn't recommend it highly enough.
After making the mistake of buying a Schmidt Cassegrain as my first telescope 30 years ago and then seldom using it, I decided to do the right thing upon getting back into astrophotography and buy a small refractor. After reviewing the range of Askar offerings I bucked the popular trend of choosing the faster Askar FRA400 and instead went for the slightly slower and optically superior 65PHQ, and I'm extremely pleased with my decision. I also have the matching Askar 0.75x reducer. The scope and accessories are beautifully made, wonderful to use, and are delivering images way better than I'd hoped for (example attached). Mine is mounted to a ZWO AM5, with a Prima Luce SESTO SENSO robotic focuser (requires a custom adapter due to a smaller than typical focusing shaft diameter, mine made and fitted beautifully by Testar). I have absolutely nothing but positive things to say about this scope. If you're looking for a refractor around this focal length you'd be crazy not to consider one of these. The attached SHO image has 11.5 hours integration time, shot from my Bortle 6 backyard. I think it says it all.
My first serious telescope and I couldn’t be happier
Mounted on my skywatcher adventurer GTI mount with ZWO EAF and ASI air plus, this scope is incredible for the price
I took the images below on my first time trying this rig just with a stock Canon camera (200d)
Jamie and the team are awesome with help and advice too!
