Thinking About a New Scope? Think Big!


920-648-2328


Ordering



M57 Ring Nebula

M57. Taken with 25" f/5 Obsession, ServoCAT drive, MallinCam Pro video camera.


Chris Anderson

Chris Anderson in Eddyville, Kentucky receives his 22"UC


specs

Need more help/info?

Send us an email. We can help with choosing the aperture, model, accessories, delivery dates, and special requests.

ORDERING INFO

(US and Canadian customers)

Ordering is easy.

Deposit required to place order.

Please send a check for the required deposit to:

OBSESSION TELESCOPES
PO BOX 804
LAKE MILLS, WI 53551

Please include your name, phone number, shipping address, email address, and a list of options/accessories you want with your scope.

Or send us an email with above info and drop the deposit check in the mail.

After we receive your deposit, we will send a hard copy confirmation letter by Post.

ORDERING INFO

(Overseas customers)

Please send us an email for ordering instructions.



Comparisons

Typical 8"

12.5"

15"

18"

20"

22"

25"

Light gathering power over typical 8" Schmidt-Cassegrain - 2.5X 4X 5X 6X 7.6X 10X
Limiting stellar magnitude: 14.0 15.0 15.5 16.0 16.5 16.7 17
Rayleigh Resolution Limit: 0.68
arc seconds
0.38
arc seconds
0.36
arc seconds
0.31
arc seconds
0.27
arc seconds
0.25
arc seconds
0.22
arc seconds
Contrast Limit:
(minimum diameter before
a nebular object fades from view)
11
arc minutes
6.0
arc minutes
5.7
arc minutes
4.8
arc minutes
4.3
arc minutes
4.0
arc minutes
3.4
arc minutes

M13 comparison