William Optics RedCat II 51 F4.9 Petzval telescope

 999,00

The William Optics RedCat 51 II is a 51mm Petzval quadruplet APO refractor with synthetic fluorite optical glass. This 2022 model is again slightly improved compared to its predecessor.

8 in stock (can be backordered)

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):
43
Limiting magnitude:
11.24
 999,00
8 op voorraad
Delivery time: 1 to 3 business days
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Description

2022 model RedCat 51 II with improved focus tension control.

The William Optics RedCat II 51 F4.9 Petzval telescope has been modified for 2022 with a small improvement to the focusing device. Mainly in the part where you can control the smoothness of focusing. This renewed “focus tension control” provides a focusing device that can be adjusted even better. As is known, the RedCat 51 is a derivative of a conventional photography lens. Only without the technical gadgets such as automatic focusing. The RedCat will not look out of place in the collection of the nature photographer and it has become an indispensable part of the collection of astrophotography photographers.

William Optics RedCat II 51 F4.9 Petzval telescope

Field rotator of the William Optics RedCat II 51 F4.9 Petzval telescope

As you can see in the photo above, the field rotator is equipped with an engraved 360 degree arc. The protractor allows you to determine and adjust the “framing” of your camera very precisely. A tilter is screwed onto the rotator, with this tilter you can correct any deviations from your sensor. If the sensor is not 100% flat in its housing, it is possible to remedy this with the tilter. When the tilter is unscrewed, you can place a 2 inch filter.

William Optics RedCat II 51 F4.9 Petzval telescope

Helical focusing device

Focusing is done in exactly the same way as with a conventional photography lens, by turning the black knurled ring. This results in fast but accurate focusing. With the red tension ring, which is incorporated in the dew shield, you can adjust how smoothly you want the Helical focusing device to turn. The dew cap again has a cover with a Bahtinov mask incorporated.

Delivery of the William Optics RedCat II 51 F4.9 Petzval telescope includes:

  • RedCat 51 II
  • Arca/Swiss -Vixen style dovetail
  • RedCat Tube Ring
  • Dust cover with Bahtinov mask and cover cap screwable
  • Storage bag

Back focus scheme:

William Optics RedCat II 51 F4.9 Petzval telescope

Place your order online or visit the store

Have you found what you’re looking for and would you like to order the RedCat 51 II or the RedCat 71, for example? Then you can do this very easily online. Would you rather see these products in person before buying them? That is also possible with us. You are most welcome in our showroom in Amstelveen from Monday to Friday between 10:00 and 17:00. The showroom is also open on Saturdays, but from 10 a.m. to 4.30 p.m. For more information and advice you can also contact us by phone on 020-6412083. We are happy to help you.

Specifications general

State:
New

Brand:
William Optics

Series:
RedCat

Warranty:
2 years

Part number Ganymedes:
WO-L-RC51II

Part number manufacturer:
L-RC51II


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):
43

Limiting magnitude:
11.24

Coatings:
Unknown

Mount:
None

GOTO:
Not applicable

Focuser type:
Other

Focuser size:
Not applicable

Focuser rotatable:
No

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):
1.3

Tube length (mm):
291

Tube diameter (mm):
80

Supplied viewfinder:
No

Included eyepieces:
No

Supplied diagonal:
No

Supplied tripod/mount:
No


Application

Suitable for astrophotography:
Excellent

Suitable for moon and planets:
Moderate

Suitable for nebulae and galaxies:
Moderate

Suitable for sun:
Excellent

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


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