William Optics RedCat 51 APO 250mm F/4.9

 925,00

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William Optics RedCat 51 APO 250mm

Note: This product has been replaced by a new page/version of the product, click here to view or order the William Optics RedCat II 51 F4.9 Petzval telescope . This is a successor of the RedCat, the old RedCat (mentioned on this page) can no longer be ordered.

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Description

William Optics RedCat 51 APO 250mm, f/4.9 Petzval optical design.

From the beginning of this telescope, William kept in mind that it was a portable, small telescope with the best possible optics and optical design, especially fast and useful for astrophotography at the lowest possible price. With this RedCat and its 51mm aperture, Petzval optical design and f/4.9 focal ratio, it looks like William has succeeded in his mission.

Optical design

 

As mentioned, the lens has a 51 mm aperture with a focal length of 250 mm in a Petzval design, the glass is made of FPL-53 and FPL-51. The optical design consists of 4 elements processed in 3 groups. This makes the telescope suitable for full frame with a flat field.

 

 

Focus

The Helical focuser ensures a very fine focus of the desired object. The focus tube is graduated, ideal for photographic purposes. The present field rotator ensures that you can make accurate mosaic shots. It also has a scale. See photo in the gallery.

The RedCat has a camera with M48 thread. Nowadays almost most cameras can be connected to this. The mounting on a mount or a photo tripod is a piece of cake. Vixen style dovetail is included in the scope of delivery of the telescope, this dovetail can also be used with connection of the ARCA-SWISS type. The William Optics RedCat can also be connected effortlessly to ordinary photo tripods.

REDCAT has been renewed from October 2019, small improvements that make the REDCAT even better. In the photo below you can see what the improvements are. Unfortunately, this has led to a price increase of the REDCAT.

There is now also a larger version of the RedCat 51 and that is the RedCat 71.

The delivery of the William Optics RedCat 51 APO 250mm includes:

  • RedCat 51 telescope
  • Bag for transport/protection
  • Dovetail for mounting on a photo tripod or astronomical mount
  • M48 thread for camera mounting
  • Bahtinov mask processed in the cover cap

Specifications general

State:
New

Brand:
William Optics

Series:
CAT series

Warranty:
2 years

Part number Ganymedes:
WO-L-RC51lx

Part number manufacturer:
L-RC51lx


Specifications product

Aperture (mm):
51

Focal length (mm):
250

Speed ​​(f):
4.9

Maximum meaningful magnification (x):
127.5

Minimum meaningful magnification (x):
8.16

Maximum resolution (arcsec/pixel):
2.27

Image circle (mm):
Onbekend

Limiting magnitude:
11.24

Coatings:
Other

Mount:
None

GOTO:
No

Focuser type:
Other

Focuser size:
Other

Focuser rotatable:
Yes

Focuser fine adjustment:
No 1 on 1

Color:
Red

Type:
Refractor

Type of optics:
Apochromat triplet Petzval (4 lens design)

Tube material:
Aluminum

Tube weight (kg):
1.47

Tube length (mm):
225

Tube diameter (mm):
80

Supplied viewfinder:
No

Included eyepieces:
Not applicable

Supplied diagonal:
No

Supplied tripod/mount:
No


Application

Suitable for astrophotography:
Excellent

Suitable for moon and planets:
Moderate

Suitable for nebulae and galaxies:
Excellent

Suitable for sun:
Good

Suitable for panorama or penthouse:
Moderate

Suitable for children:
No

Suitable for novice user:
No

Suitable for advanced user:
Yes

Suitable accessories

We have not yet selected suitable accessories for this product.
Any suitable accessories are carefully selected by us and assigned manually.
Please contact us if you want to know which accessories are well suited with this product!

Service and support

No text available


Categories

telescopes-en telescopes-all-telescopes-en telescopes-astrophotography-telescopes-en telescopes-refractor-telescopes-en telescopes-refractor-all-refractor-telescopes-en telescopes-refractor-apochromatic-doublet-en telescopes-refractor-astrophotography-en brands-en brands-william-optics-en brands-william-optics-cat-series-en

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