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Celestron Deluxe Tele-Extender
- Price: $53.49
- Free Shipping (USA)
- In Stock
- B&H # CETED
- Mfr# 93643
Product Highlights
- For Eyepiece Projection Imaging
- For 5-14" Celestron Cassegrains
- For 7" & Larger Meade Cassegrains
- Requires Celestron Visual Back
- Requires an Eyepiece
- Requires a Camera-Specific T-Mount
Remember the Essentials
A Camera-Specific T-Mount adapter is required but not included with this item. Please be sure to purchase the T-Mount adapter that fits the camera you will be using.
The Celestron Deluxe Tele-Extender for Schmidt-Cassegrain telescopes is a hollow tube that attaches to a telescope with an eyepiece installed, allowing photography of very small objects such as the moon and planets. By using the Deluxe Tele-Extender in combination with an eyepiece, you can increase your instrument's effective focal length to well over 10,000mm! And this corresponds with a matching increase in image size. This technique is known as eyepiece projection photography. The following formula can be used to determine approximate effective focal length:
Effective focal length = Telescope focal length/Eyepiece focal length x DF(the distance from the center of the eyepiece to the film)
The Deluxe Tele-Extender is used for high-power lunar, solar and planetary photography as well as for extreme terrestrial photography. It fits over a 1.25" eyepiece up to 41mm thick and connects to the visual back of the telescope. Optional counterweights will be necessary to properly balance the telescope when using the Tele-Extender. Please note that Celestron's visual back, #93653-A, is required in all cases.
To use the Deluxe Tele-Extender, remove the diagonal from your telescope and insert an eyepiece directly into the visual back. Place the Tele-Extender over both the eyepiece and the visual back, then attach your 35mm SLR camera to the back of the Tele-Extender using your camera system's specific T-mount. The Tele-Extender's built-in safety device will help prevent your eyepiece from becoming accidentally dislodged.
There are a few things to bear in mind when using a Tele-Extender. First, the image seen through your camera's viewfinder will be upside down. Second, due to the extremely high magnifying effect afforded by this accessory, extra care to prevent camera and telescope vibration, accurate polar alignment and use under good seeing conditions will all assist you in capturing high quality images.
- Accepts 1.25" eyepieces of up to 41mm diameter
- Celestron's visual back is required (supplied standard with Celestron scopes, and a required option when using upon Meade telescopes)
REVIEW SNAPSHOT®
by PowerReviews(based on 10 reviews)
Ratings Distribution
89%
of respondents would recommend this to a friend.
Pros
- Strong construction (10)
- Easy to use (8)
Cons
Best Uses
- Astrophotography (8)
- Astronomy (4)
- Terrestrial viewing (3)
- Reviewer Profile:
- Casual/ recreational (7), Avid adventurer (3)
- Was this a gift?:
- No (7)
Most Liked Positive Review
Easy to setup and use
I thought this would be hard, but it wasn't. I had some very big Celestron X-cel eyepieces and I was able to use them all with this. And the results were very good. ...Read complete review
I thought this would be hard, but it wasn't. I had some very big Celestron X-cel eyepieces and I was able to use them all with this. And the results were very good. I did not need to add any counterbalance after using my largest eyepiece, a Canon 500D on a C8-SLT AS mount. It all worked well and only took a few minutes to connect together and start shooting.The 18mm eyepiece gave me a FL of about 15000 and the 10mm eyepiece a staggering 28000.
VS
Most Liked Negative Review
Solid, slot is puzzling
Solid aluminum, holds the camera rigidly on a Celestron 8SE.
Only one slot cut in it for the visual back's eyepiece screw(s). Why?
(Removable) housing over ...Read complete review
Solid aluminum, holds the camera rigidly on a Celestron 8SE.
Only one slot cut in it for the visual back's eyepiece screw(s). Why?
(Removable) housing over the slot doesn't fit over the visual back's eyepiece screw. Why?
I've removed the housing over the slot. I'm going to have to cut another eyepiece screw slot, I guess. Otherwise I'm going to have to remove (and possibly lose) one of the eyepiece screws every time I use this. Don't like the feeling of only having one screw holding the eyepiece in anyway.
It does the job just fine once you get it on and find focus. My 32mm eyepiece fully covered the full-frame sensor of a Nikon D700 and gave about 2x magnification over the camera at prime focus. Of course, at a significant cost in illumination...
REVIEWS
Reviewed by 10 customers
Sort by
Displaying reviews 1-10
Pros
- Easy To Use
- Strong Construction
Cons
Best Uses
- Astrophotography
- Terrestrial Viewing
Comments about Celestron Deluxe Tele-Extender:
recieved this in a very timely manner. i use this for projection photography. it houses all my oculars well. even if i make-up a set (ie:a 1 1/4 barlow and a 40 or 32 mm taped together) it fits my focuser and camera well. no complaints
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
Cons
- Poor design
Best Uses
- Lunar Photography
Comments about Celestron Deluxe Tele-Extender:
Solid aluminum, holds the camera rigidly on a Celestron 8SE.
Only one slot cut in it for the visual back's eyepiece screw(s). Why?
(Removable) housing over the slot doesn't fit over the visual back's eyepiece screw. Why?
I've removed the housing over the slot. I'm going to have to cut another eyepiece screw slot, I guess. Otherwise I'm going to have to remove (and possibly lose) one of the eyepiece screws every time I use this. Don't like the feeling of only having one screw holding the eyepiece in anyway.
It does the job just fine once you get it on and find focus. My 32mm eyepiece fully covered the full-frame sensor of a Nikon D700 and gave about 2x magnification over the camera at prime focus. Of course, at a significant cost in illumination...
- Was this a gift?:
- No
Pros
- Strong Construction
Cons
- Poor Construction
Best Uses
Comments about Celestron Deluxe Tele-Extender:
I was excited to use this after it arrived to try it out. It is sloppy and will not hold the camera directly over the eyepiece. I'm disappointed that Celeron couldn't design a better product. For what I paid for this, I would think it would at least hold the Eyepiece centered
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
Cons
Best Uses
- Astronomy
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
It's expensive for what it is, but it's of better construction than the other 3rd party tele extender I purchased.
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
- Widely Compatible Adapter
Cons
Best Uses
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
Taking photos of the moon and planets
- Was this a gift?:
- No
Pros
- Strong Construction
Cons
- Poor Fit
Best Uses
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
The unit fits over the visual back. The projection eyepiece is placed in the visual back and secured with the standard retaining screw. The unit needs the appropriate T ring adaptor to attach to your camera.
Positives
Well constructed and solid
Will work perfectly
Negatives
Expensive for a simple projection fitting.
The standard eyepiece retaining screw will not slide into the little metal box made for it. I had to use an Allen key to undo the box and swing it around 180 degrees out of the way. Then no problem.
The second retaining screw has to be removed from the visual back before use. Surely they could have arranged a slot for this to slide into also.
- Was this a gift?:
- No
Pros
- Easy To Use
- Great Optics
- Strong Construction
Cons
Best Uses
- Astronomy
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
I use this on my Celestron CPC 8 and it works great.
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
Cons
Best Uses
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
I like it. It has a feeling of it being made to last.
Pros
- Easy To Use
- Strong Construction
Cons
- Bulky
- Heavy
Best Uses
- Astronomy
- Astrophotography
- Terrestrial Viewing
Comments about Celestron Deluxe Tele-Extender:
Was easy to setup and I used it with my very large Celestron X-Cel eyepieces which I thought would not fit. I did not have to use any additional counterweights with my C8-SGT AS mount, fitted with my largest eyepiece and a canon EOS 500D. The results were better than I expected. With the 18mm eyepiece, the FL was around 14000 and with the 10mm eyepiece, a staggering 28000.
Pros
- Easy To Use
- Strong Construction
- Widely Compatible Adapter
Cons
- Long
Best Uses
- Astronomy
- Astrophotography
- Terrestrial Viewing
Comments about Celestron Deluxe Tele-Extender:
I thought this would be hard, but it wasn't. I had some very big Celestron X-cel eyepieces and I was able to use them all with this. And the results were very good. I did not need to add any counterbalance after using my largest eyepiece, a Canon 500D on a C8-SLT AS mount. It all worked well and only took a few minutes to connect together and start shooting.The 18mm eyepiece gave me a FL of about 15000 and the 10mm eyepiece a staggering 28000.
Displaying reviews 1-10
REVIEW SNAPSHOT®
by PowerReviews(based on 10 reviews)
Ratings Distribution
89%
of respondents would recommend this to a friend.
Pros
- Strong construction (10)
- Easy to use (8)
Cons
Best Uses
- Astrophotography (8)
- Astronomy (4)
- Terrestrial viewing (3)
- Reviewer Profile:
- Casual/ recreational (7), Avid adventurer (3)
- Was this a gift?:
- No (7)
Most Liked Positive Review
Easy to setup and use
I thought this would be hard, but it wasn't. I had some very big Celestron X-cel eyepieces and I was able to use them all with this. And the results were very good. ...Read complete review
I thought this would be hard, but it wasn't. I had some very big Celestron X-cel eyepieces and I was able to use them all with this. And the results were very good. I did not need to add any counterbalance after using my largest eyepiece, a Canon 500D on a C8-SLT AS mount. It all worked well and only took a few minutes to connect together and start shooting.The 18mm eyepiece gave me a FL of about 15000 and the 10mm eyepiece a staggering 28000.
VS
Most Liked Negative Review
Solid, slot is puzzling
Solid aluminum, holds the camera rigidly on a Celestron 8SE.
Only one slot cut in it for the visual back's eyepiece screw(s). Why?
(Removable) housing over ...Read complete review
Solid aluminum, holds the camera rigidly on a Celestron 8SE.
Only one slot cut in it for the visual back's eyepiece screw(s). Why?
(Removable) housing over the slot doesn't fit over the visual back's eyepiece screw. Why?
I've removed the housing over the slot. I'm going to have to cut another eyepiece screw slot, I guess. Otherwise I'm going to have to remove (and possibly lose) one of the eyepiece screws every time I use this. Don't like the feeling of only having one screw holding the eyepiece in anyway.
It does the job just fine once you get it on and find focus. My 32mm eyepiece fully covered the full-frame sensor of a Nikon D700 and gave about 2x magnification over the camera at prime focus. Of course, at a significant cost in illumination...
REVIEWS
Reviewed by 10 customers
Sort by
Displaying reviews 1-10
Pros
- Easy To Use
- Strong Construction
Cons
Best Uses
- Astrophotography
- Terrestrial Viewing
Comments about Celestron Deluxe Tele-Extender:
recieved this in a very timely manner. i use this for projection photography. it houses all my oculars well. even if i make-up a set (ie:a 1 1/4 barlow and a 40 or 32 mm taped together) it fits my focuser and camera well. no complaints
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
Cons
- Poor design
Best Uses
- Lunar Photography
Comments about Celestron Deluxe Tele-Extender:
Solid aluminum, holds the camera rigidly on a Celestron 8SE.
Only one slot cut in it for the visual back's eyepiece screw(s). Why?
(Removable) housing over the slot doesn't fit over the visual back's eyepiece screw. Why?
I've removed the housing over the slot. I'm going to have to cut another eyepiece screw slot, I guess. Otherwise I'm going to have to remove (and possibly lose) one of the eyepiece screws every time I use this. Don't like the feeling of only having one screw holding the eyepiece in anyway.
It does the job just fine once you get it on and find focus. My 32mm eyepiece fully covered the full-frame sensor of a Nikon D700 and gave about 2x magnification over the camera at prime focus. Of course, at a significant cost in illumination...
- Was this a gift?:
- No
Pros
- Strong Construction
Cons
- Poor Construction
Best Uses
Comments about Celestron Deluxe Tele-Extender:
I was excited to use this after it arrived to try it out. It is sloppy and will not hold the camera directly over the eyepiece. I'm disappointed that Celeron couldn't design a better product. For what I paid for this, I would think it would at least hold the Eyepiece centered
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
Cons
Best Uses
- Astronomy
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
It's expensive for what it is, but it's of better construction than the other 3rd party tele extender I purchased.
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
- Widely Compatible Adapter
Cons
Best Uses
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
Taking photos of the moon and planets
- Was this a gift?:
- No
Pros
- Strong Construction
Cons
- Poor Fit
Best Uses
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
The unit fits over the visual back. The projection eyepiece is placed in the visual back and secured with the standard retaining screw. The unit needs the appropriate T ring adaptor to attach to your camera.
Positives
Well constructed and solid
Will work perfectly
Negatives
Expensive for a simple projection fitting.
The standard eyepiece retaining screw will not slide into the little metal box made for it. I had to use an Allen key to undo the box and swing it around 180 degrees out of the way. Then no problem.
The second retaining screw has to be removed from the visual back before use. Surely they could have arranged a slot for this to slide into also.
- Was this a gift?:
- No
Pros
- Easy To Use
- Great Optics
- Strong Construction
Cons
Best Uses
- Astronomy
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
I use this on my Celestron CPC 8 and it works great.
- Was this a gift?:
- No
Pros
- Easy To Use
- Strong Construction
Cons
Best Uses
- Astrophotography
Comments about Celestron Deluxe Tele-Extender:
I like it. It has a feeling of it being made to last.
Pros
- Easy To Use
- Strong Construction
Cons
- Bulky
- Heavy
Best Uses
- Astronomy
- Astrophotography
- Terrestrial Viewing
Comments about Celestron Deluxe Tele-Extender:
Was easy to setup and I used it with my very large Celestron X-Cel eyepieces which I thought would not fit. I did not have to use any additional counterweights with my C8-SGT AS mount, fitted with my largest eyepiece and a canon EOS 500D. The results were better than I expected. With the 18mm eyepiece, the FL was around 14000 and with the 10mm eyepiece, a staggering 28000.
Pros
- Easy To Use
- Strong Construction
- Widely Compatible Adapter
Cons
- Long
Best Uses
- Astronomy
- Astrophotography
- Terrestrial Viewing
Comments about Celestron Deluxe Tele-Extender:
I thought this would be hard, but it wasn't. I had some very big Celestron X-cel eyepieces and I was able to use them all with this. And the results were very good. I did not need to add any counterbalance after using my largest eyepiece, a Canon 500D on a C8-SLT AS mount. It all worked well and only took a few minutes to connect together and start shooting.The 18mm eyepiece gave me a FL of about 15000 and the 10mm eyepiece a staggering 28000.
Displaying reviews 1-10
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