Thursday, May 12, 2022

Acuter Maksy 60 Specifications

Acuter Maksy 60 Specs

The Acuter 60mm (2.4-inch) diameter telescope has a Maksutov-Cassegrain catadioptric design and is precision made and optically a perfect as possible. 

Stars are perfect pinpoints and the diffraction rings both inside and outside of focus are picture perfect. The telescope is multi-purpose. With the stock tripod and stock eyepiece, it excels with Moon, daytime objects, and Jupiter Moons. With EPs of greater focal length, and a steady mount, Jupiter, Saturn, Venus and Mars come into view depending on their relative distance to the Earth and how close they are to opposition.

Specifications
Taiwan Name - Mini Horse Multifunctional Life Telescope
Acuter Optics Telescope Name - Acuter Maksy 60
Design - Maksutov-Cassegrain Catadioptric
Aperture/Diameter - 60mm (2.4")
Focal Ratio - f/12.5
Focal Length - 750mm (29.5")
Optical Coating: Multi Layer Film
Eyepiece 20mm - 37.5x
OTA Length - 25 cm (8.25"), 10" with 90-deg. Diagonal
OTA Outer Diameter - 82mm (3.2")
OTA Weight - 467 grams (1 lb)
Tripod Weight - 360 grams (.8 lb)
Tripod Height - 20 cm (7.9")
Light Gathering - 73.5 times the naked eye
Theoretical Power at 50x/aperture inch = 120x
Practical Power (20-30x/inch) - 48 to 72x
True Field of View - 1.8° (Pleiades fits into the field of view)
Exit Pupil - 1.6 mm
Theoretical Resolving Power - 1.93 arcseconds
Approximate Limiting Magnitude = +11.4 (dark, moonless sky)
Dawes Limit - 1.9 arcseconds
Raleigh Limit - 2.27 arcseconds
Assembled Height - 30.5mm (12" To Diagonal Top)
Finder - Two Line-of-Sight protrusions (protuberances) on OTA
Box Contents - OTA, Tabletop Tripod Mount, 20mm Eyepiece (37.5x), 90-deg. Diagonal, Lens Cap, Instruction Manual, Mobile Phone Adapter, Frosted Glass Projection Eyepiece
Purchased Accessories: Sun Filter with Sun Finder
Best Use - Moon, Jupiter Moons, Sun with Filter

Eyepiece Magnification Guide
EP      Power   2x     Barlow Focal Reducer
6mm   125x    250x   62.5x
10mm 75x      150x   37.5
20mm 37.5x   75x     18.8
25mm 30x      60x     15
30mm 25x      50x     12.5
40mm 19x      38x       9.5
Focal Length = 750mm
8mm - 24mm ( 94x - 31x) Variable Zoom
Prime Focus = 29.5x
2x Barlow Projection = 59x
1/2x Focal Reducer = f/12.5 (750mm FL) to f/6.25 (375mm FL)
2 Stacked Focal Reducers = f/3.1 (187.5mm)

Baader Mark IV Hyperion 8mm-24mm (8,12,16,20,24)
Acuter Solar Telescope: 750mm (29.5-inch) FL, 60mm (2.4-inch) aperture

08mm - 93.75
12mm - 62.50x
16mm - 46.88x
20mm - 37.50x
24mm - 31.25x

Under prefect seeing, the maximum power per aperture inch is 50x.
2.4" x 50 = 120x. 6.25mm - 120x

The theoretical power of any telescopes is 50x per inch of aperture.  (2.4")(50)=120x However, under average sky conditions, the practical power recommended to be used is 20-30 x per inch of aperture. 48x - 72x

Definitions

Focal Length
The distance (usually expressed in millimeters) from a mirror or lens to the image that it forms. In most telescopes the focal length is roughly equal to the length of the tube. Some telescopes use extra lenses and/or mirrors to create a long effective focal length in a short tube.

Magnification
The amount that a telescope enlarges its subject. It’s equal to the telescope’s focal length divided by the eyepiece focal length. As a rule of thumb, a telescope’s maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters).

True Field of View
The circle of sky that you see when you look through a telescope or binoculars. Generally, the lower the magnification, the wider the field of view.

Exit Pupil
The size of the circle of light that hits your eye when you look through the eyepiece. If the exit pupil is larger than 7mm, it means your eye probably won't see all the light coming from the eyepiece. (That's because, for an average adult, the pupil of the dark-adapted human eye is only 7 mm wide.) So in that case you should switch to a higher magnification.

Theoretical Resolving Power
The angular size of the smallest detail you can see at high magnification. This tells you the closest double star you can expect to separate.

Approximate Limiting Magnitude of Telescope
A number denoting the faintest star you can expect to see. The higher the magnitude, the fainter the star. For example, a 1st-magnitude star is 100 times brighter than a 6th-magnitude star.

Dawes Limit
Dawes Limit = 4.56/D inches = 116/Dmm. Dawes Limit is the first point at which a double star is elongated enough to suspect the presence of two stars. Dawes limit for a 6" / 150mm telescope is 4.56/6 or 116/150 = 0.77 arcseconds. For the Acuter Maksy 2.4" = 4.56/2.4 = 1.9 arcseconds

Rayleigh Limit
Rayleigh Limit = 5.45/D inches = 138/Dmm. Rayleigh Limit is a measure defining the limit at which two components can be clearly identified as separate components. It defines the distance between the centers of two Airy disks where the maximum of one is placed over the minimum of the other. The Rayleigh limit of a 6"/150mm telescope is 5.45/6" or 138/150 = 0.91 arcseconds.

Maximum Useful Magnification
As a rule of thumb, a telescope's maximum useful magnification is 50 times its aperture in inches (or twice its aperture in millimeters).

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