Built for wide-field imaging, the Gear Series 90mm Triplet APO Refractor optical tube assembly from Starfield features a triplet lens with an Ohara FPL-53 apochromatic element. Internal baffling counters stray light and improves contrast. The ball bearing-supported 2.5" focuser accepts 2" and 1.25" eyepieces and accessories. Threaded for 63mm accessories, the focuser is sturdy enough for heavy cameras and astrophotography equipment. The manual camera angle adjuster provides framing options during your imaging sessions. The OTA is compatible with an optional motorized focuser and requires a separately available tripod or pier and mount for use.

540mm Focal Length, f/6 Focal Ratio    Triplet Lens with FPL-53 ED Element    Internally Baffled Tube    Multicoated Optics    2.5" R&P Focuser with 1:10 Gearing    Camera Angle Adjuster    Accepts 2" & 1.25" Eyepieces/Accessories    Sturdy CNC Rings    Handle with Accessory Slots    Retractable Dew Shield

• 90mm diameter aperture
• 540mm focal length and fast f/6.0 focal ratio allow low exposure times
• Triplet lens with extra-low dispersion FPL-53 apochromatic element for true color rendition without aberrations across the entire field of view
• Standard finderscope mounting shoe
• M63 x 1 female thread

• 2.5" rack-and-pinion focuser with 1:10 gearing, Teflon bushing, and ball bearing support can accommodate heavy astrophotography cameras, filter wheels, etc.
• Accepts 1.25" and 2" eyepieces and accessories
• 2" adapter with brass compression ring and three clamping screws
• Compatible with optional focusing motor
• CNC-machined aluminum rings and handle with slots for accessories
• Retractable dew shield
• Long Vixen-style dovetail bar

Related Questions and Answers

Q: 1. What do I need to purchase along with this product to connect my Canon 60D for astrophotography ?

A: First you would need a T-Adapter that goes into the eyepiece part of the scope. The Celestron-SLR (35mm OR Digital) Camera Adapter would work great. Wesbite Link to the T-Adapter: a href= http://bhpho.to/1lwAhIO target= _blank http://bhpho.to/1lwAhIO/aNow to mount your Canon 60D you would need what is called a T-Ring, which threads onto the T-Adapter. The Vello Lens Mount Adapter-T-Mount Lens to Canon EOS Camera will be perfect. Website link to the T-Ring: a href= http://bhpho.to/19wYgWY target= _blank http://bhpho.to/19wYgWY/aThese are the 2 adapters you would need to attach your camera to this scope.

Q: 2. I purchased this scope a few weeks ago. I have yet to achieve focus using a dslr without the diagonal. I've purchased 2" extension tubes that just dont fit on the tubes that came with it. What extention tubes actually fit on this?

A: What make and model of camera are you using and where in the scope are you mounting the camera

Q: 3. In your preview of the telescope were four pictures of what the telescope sees. What do I need to do to see things that clear. What do I need to be able to photograph what I see thru the telescope eyepiece?

A: Pictures like the ones you see are taken with camera attached directly to the Optical Tube Assembly (the telescope without diagonal or eyepiece). To do this with the EVO72, these are the devices you would need: BH# SKE72EDRCA, SKFRFP80 and the correct SkyWatcher M48 adapter for either Nikon, Canon or Sony E mount camera.

Q: 4. For Nikon D5300 camera which T-adapter is recommend to connect the telescope?

A: Skywatcher T mount MFR# S20301 plus Celestron camera adapter MFR# 93625.

Q: 5. What parts do I need to mount my Nikon Z mirrorless to this scope?

A: You would need this T mount adaopter to connect the Nikon Z camera to a T mount slipped into the eyepiece mount of the telescope: https://www.bhphotovideo.com/c/product/1494991-REG/vivitar_hf_t2_nik_z_t_mount_to_nikon_z_mount.html Then you will need to get the actual T mount : https://www.bhphotovideo.com/c/product/202135-REG/Celestron_93625_SLR_35mm_OR_Digital.html

Q: 6. Can you use 72mm screw on filters on the objective end?

A: The objective end of the Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope does not accept screw on filters.

Q: 7. What accessory should I use to mount guiding camera or eyepiece? The focusing distance not sufficient to achieve focus...

A: This should work. iOptron TT-FTA100 Camera to Telescope Adapter BH #IOTTFTA100 • MFR #TT-FTA100 https://www.bhphotovideo.com/c/product/1160280-REG/ioptron_tt_fta100_camera_to_telescope.html

Q: 8. What accessory do I need to mount it on C11 OTA?

A: You would need this plate: https://bhpho.to/3oFrEmo In order to get the scope onto plate, please remove the Vixen style dovetail plate from the bottom of the mounting rings & mount the Losmandy DC11 dovetail plate in its place.

Q: 9. What do you need to connect a Cannon EOS 50 mark II ?

A: To mount your Canon EOS M50 Mark II Mirrorless Camera to the Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor Guidescope (OTA Only) BH #SKS11180 • MFR #S11180 you will need the Explore Scientific T-Mount Adapter (2") BH #EX510365 • MFR #510365 and the Vivitar T-Mount to Canon EF-M Mount Adapter BH #VIHFT2EOSM • MFR #HF-T2-EOS-M

Q: 10. Is the ED glass FPL-51 or FPL-53?

A: That information is not provided by the manufacture