For Sale - Sold: Celestron C90 + extras

wilkin · 03-16-2009, 09:27 AM

PentaxForums.com Marketplace Listing

Item for Sale
Celestron C90 1000mm + extras

Asking Price
280 obo USD shipped (within CONUS)

Item Description
comes with original case, Canon mount w/cap but can be replaced with a Pentax T-adapter, Celestron Star Diagonal .96, Celestron 16mm Kellner .96 fully coated Eyepiece, original lens cover. There is some dust inside but can probably be cleaned

click to enlarge

Are you the original owner of the item being sold?
No

Are you selling or trading this item?
Selling

Item Condition
Used
Mint

Item Location
Richmond Virginia

Shipping Charge
included

Shipping Services
USPS UPS

Shipping Destinations
United States

Accepted Payment Types
PayPal Check/Money Order

Additional Details
price is negotiable shipping is included

Please send me a private message if interested in the item!

Last edited by wilkin; 03-16-2009 at 12:35 PM. Reason: add

wilkin · 03-16-2009, 11:11 AM

quick bump

Sodbuster · 03-16-2009, 11:56 AM

I'm guessing that the C90 has a 90mm objective. What is the focal length in mm, such that would make sense to photographers? It is a better than average cat lens, isn't it?

wilkin · 03-16-2009, 12:35 PM

Originally posted by Sodbuster

I'm guessing that the C90 has a 90mm objective. What is the focal length in mm, such that would make sense to photographers? It is a better than average cat lens, isn't it?

1000mm focal length, not sure if its better or not, but you can get some extreme close ups

Last edited by wilkin; 03-16-2009 at 12:37 PM. Reason: fix

Peter Zack · 03-16-2009, 12:47 PM

And with these you divide the focal length by the diameter to get the aperture. So this one's f11.11 (1000/90)

Sodbuster · 03-16-2009, 01:58 PM

Celestron makes telescopes. I would just guess that it is a better mirror lens than my Phoenix 500mm..

I don't -know- that.

wilkin · 03-16-2009, 02:22 PM

Originally posted by Peter Zack

And with these you divide the focal length by the diameter to get the aperture. So this one's f11.11 (1000/90)

ya its f/11

Originally posted by Sodbuster

Celestron makes telescopes. I would just guess that it is a better mirror lens than my Phoenix 500mm..

I don't -know- that.

couldn't tell you either, Ive never used a Phoenix 500mm

wilkin · 03-16-2009, 05:30 PM

quick bump

wilkin · 03-18-2009, 02:41 PM

2nd day bump

03-16-2009, 09:27 AM	#1
wilkin Senior Member Join Date: Jan 2009 Location: Richmond 里士满 Va Posts: 161 Feedback Score: 4 (100%)	[SOLD] Celestron C90 + extras PentaxForums.com Marketplace Listing Item for Sale Celestron C90 1000mm + extras Asking Price 280 obo USD shipped (within CONUS) Item Description comes with original case, Canon mount w/cap but can be replaced with a Pentax T-adapter, Celestron Star Diagonal .96, Celestron 16mm Kellner .96 fully coated Eyepiece, original lens cover. There is some dust inside but can probably be cleaned click to enlarge Are you the original owner of the item being sold? No Are you selling or trading this item? Selling Item Condition Used Mint Item Location Richmond Virginia Shipping Charge included Shipping Services USPS UPS Shipping Destinations United States Accepted Payment Types PayPal Check/Money Order Additional Details price is negotiable shipping is included Please send me a private message if interested in the item! Last edited by wilkin; 03-16-2009 at 12:35 PM. Reason: add

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03-16-2009, 11:11 AM	#2
wilkin Senior Member Join Date: Jan 2009 Location: Richmond 里士满 Va Posts: 161 Feedback Score: 4 (100%) Original Poster	quick bump

03-16-2009, 11:56 AM	#3
Sodbuster Inactive Account Join Date: Jan 2009 Location: SE Minnesota Posts: 109 Feedback Score: 1 (100%)	I'm guessing that the C90 has a 90mm objective. What is the focal length in mm, such that would make sense to photographers? It is a better than average cat lens, isn't it?

03-16-2009, 12:35 PM	#4
wilkin Senior Member Join Date: Jan 2009 Location: Richmond 里士满 Va Posts: 161 Feedback Score: 4 (100%) Original Poster	Originally posted by Sodbuster I'm guessing that the C90 has a 90mm objective. What is the focal length in mm, such that would make sense to photographers? It is a better than average cat lens, isn't it? 1000mm focal length, not sure if its better or not, but you can get some extreme close ups Last edited by wilkin; 03-16-2009 at 12:37 PM. Reason: fix

03-16-2009, 12:47 PM	#5
Peter Zack Pentaxian Moderator Emeritus Join Date: May 2007 Location: Edmonton Alberta, Canada Posts: 10,643 Feedback Score: 117 (100%)	And with these you divide the focal length by the diameter to get the aperture. So this one's f11.11 (1000/90)

03-16-2009, 01:58 PM	#6
Sodbuster Inactive Account Join Date: Jan 2009 Location: SE Minnesota Posts: 109 Feedback Score: 1 (100%)	Celestron makes telescopes. I would just guess that it is a better mirror lens than my Phoenix 500mm.. I don't -know- that.

03-16-2009, 02:22 PM	#7
wilkin Senior Member Join Date: Jan 2009 Location: Richmond 里士满 Va Posts: 161 Feedback Score: 4 (100%) Original Poster	Originally posted by Peter Zack And with these you divide the focal length by the diameter to get the aperture. So this one's f11.11 (1000/90) ya its f/11 Originally posted by Sodbuster Celestron makes telescopes. I would just guess that it is a better mirror lens than my Phoenix 500mm.. I don't -know- that. couldn't tell you either, Ive never used a Phoenix 500mm

03-16-2009, 05:30 PM	#8
wilkin Senior Member Join Date: Jan 2009 Location: Richmond 里士满 Va Posts: 161 Feedback Score: 4 (100%) Original Poster	quick bump

03-18-2009, 02:41 PM	#9
wilkin Senior Member Join Date: Jan 2009 Location: Richmond 里士满 Va Posts: 161 Feedback Score: 4 (100%) Original Poster	2nd day bump