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Details about  Celestron 8-24mm Zoom 1.25" Telescope Eyepiece – NEW

Celestron 8-24mm Zoom 1.25" Telescope Eyepiece – NEW
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Item Information

Item condition:
New
Ended:
Sep 11, 2014 05:16:02 EDT
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0 available / 3 sold
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Price:
US $59.99
Approximately C $65.64(including shipping)
 
 
Shipping:
Calculate Varies based on location and shipping method
 
Item location:
Russellville, Arkansas, United States
 
Ships to:
United States, Canada
Delivery:
Payments:
International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab
Returns:
14 day money back or item exchange, buyer pays return shipping See details
Coverage:
eBay item number:
400765482371
Seller assumes all responsibility for this listing.

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
Type:

Eyepieces

Brand:

Celestron

sharp-ideas

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New In Package

Celestron
8-24mm Zoom Eyepiece 

 W E   S H I P   F A S T 

Only $59.99 ! ! !

Super-premium fully multi-coated 1.25" zoom eyepiece has a focal length of 8-24mm. Allows for expanded magnification options.

A zoom eyepiece allows a wide range of magnifications for visual use.

  • Focal length of 8mm to 24mm
  • Field of view: 40 - 60 degrees
  • Eye relief: 15 - 18mm
  • Fully Multicoated

    Threaded barrels accept 1-1/4" thread-in filters.

    Advantages of Celestron's zoom eyepiece when used for SLR (DSLR) photography:

    Allows for a wide range of magnifications when using it for photography, where the use of a zoom is a kind of eyepiece or positive projection. This method uses an eyepiece to project an image directly onto the film or chip inside your SLR camera without its lens attached.

    The great advantage of model #93230 is the built-in T-thread under the eyecup allowing you to directly screw your camera with T-ring to the eyepiece. This is extremely convenient for projection photography.

    A huge plus for Newtonian reflectors: the eyepiece as a projection lens brings the focal plane out far enough to overcome the short back focus, allowing you to focus your camera to infinity and take a clear picture.

    For any scope it can act either as a relay lens (prime focus T-adapter at unity power), not changing the effective focal length or f-number of the scope, or as a magnifier giving you larger images.

    To calculate the magnification, f-number and focal length with a zoom eyepiece, just use the same formula as for projection with a fixed focal length eyepiece for the different focal lengths you are using.

    For eyepiece projection the magnification factor is the distance between the film (or chip) and the eye lens of the eyepiece divided by the eyepiece focal length, minus 1.

    For the 8-24mm zoom, the chip-eye lens distance is about 50mm for most camera/T-ring combinations. For the fully zoomed out position at 24mm, the magnification factor is 50/24 – 1 or essentially 1.

    The new projection f-number is the magnification factor times the scope’s f-number This means that at 24mm zoom the f-number is basically the same as the f-number of the scope itself.

    Equivalent focal lengths can be calculated by multiplying these f-numbers by the aperture of your telescope. At 24mm it’s nearly the same as the original focal length of your scope.

    For an actual example, the Newtonian reflector Omni XLT 150 is f/5 and has a 150mm aperture and 750mm focal length. At 24mm zoom its f-number is 50/24 – 1 or 1.08 x 5 = f/5.4. Its equivalent focal length is 5.4 x 150 = 810mm.

    At the other end, 8mm zoom gives 50/8 – 1 or 5.25 x 5 = f/26.25. The scope’s equivalent focal length is 26.25 x 150 or 3938mm.

    Thus, you can use the eyepiece to achieve infinity focus with your camera using almost any Newtonian or other telescope. Fully zoomed out, you get the original optical system’s photographic speed and focal length. Fully zoomed in, you get larger image scales useful for close-up nature or planetary photography.

    Our store price is $74.99.

    Buy with confidence!
    We are an authorized Celestron distributor.
    This Celestron product is new in box.
    NOT a customer return or refurbished product.

  •  HAVE QUESTIONS ~ CALL TOLL-FREE ~ 1-877-739-2787 


    Shipping & Handling in the U.S. is $4.99.


    INTERNATIONAL SHIPPING TERMS:

  • Yes we combine items to lower S&H fees.

  • To receive S&H discounts, on two or more items, you must send only one payment. If you purchase more than one item please wait for us to send you a combined invoice. Each payment is considered an order. If you send two separate payments, your items will not be combined and you will not receive a discount on S&H fees.

  • S&H fees are based on the total value of the items – not just the size of the item.

  • S&H fees on a low value shipments, which are very small and light weight, is $10 for the first item and $5 for each additional item. First Class Mail is used on low value shipments. First Class Mail does not have a tracking number and cannot be insured. A low value shipment is any payment under $30.

  • S&H fees on a mid value shipment is $22 for the first item and $11 for each additional item. Economy Priority Mail is used on mid value shipments. Economy Priority Mail does not have a tracking number and cannot be insured. A mid value shipment is any payment over $30 but under $100.

  • High value shipments will only be sent by Priority Mail with tracking number and insurance. For example: if you purchase an item for $99 and the S&H fee is $35. The total payment is $134. This order will only be sent by Priority Mail with tracking number and insurance. A high value shipment is any payment over $100.

  • We have no control over delivery times. About 50% of the international mail we send are delivered in 10 to 14 days. But the other 50% takes about three to five weeks to be delivered.

  • We do not add S&H fees to the item’s value. For example: if you purchase an item for $29.99 and the S&H fee is $22, the value stated for customs is only $29.99 – not $51.99.

  • Shipments to high risk countries are sent by Priority Mail with tracking number and insurance. Most high risk countries (but not all) are located in Eastern Europe, Africa, and the Middle East.

  • We reserve the right to upgrade and change the method of shipping, to any country where we have experienced a high rate of lost packages.

  • Questions and answers about this item

    No questions or answers have been posted about this item.




    Seller assumes all responsibility for this listing.

    Shipping and handling

    Item location: Russellville, Arkansas, United States
    Shipping to: United States, Canada
    Domestic handling time
    Will usually ship within 1 business day of receiving cleared payment - opens in a new window or tab.

    Return policy

    Item must be returned within
    Refund will be given as
    14 days after the buyer receives it
    Money back or item exchange (buyer's choice)
    The buyer is responsible for return shipping costs.

    Payment details

    Payment method Preferred/Accepted Buyer protection on eBay
    Credit card or Pre-authorized Debit through PayPal
    PayPal Preferred
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