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m48x0.75 extension tube kit for astromania astronomical 2 - 5mm 8mm 10mm 20mm 30mm lengths on both sides logo

M48X0.75 Extension Tube Kit For Astromania Astronomical 2 - 5Mm 8Mm 10Mm 20Mm 30Mm Lengths On Both Sides Review

5

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Very good

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$$
Revainrating 4.5 out of 5  
Rating 
4.3
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Description of M48X0.75 Extension Tube Kit For Astromania Astronomical 2 - 5Mm 8Mm 10Mm 20Mm 30Mm Lengths On Both Sides

Male thread - M48*0.75. Female thread - M48*0.75, eliminates a range of focusing problems. The extension tube has a M48*0.75 interior thread and a M48*0.75 exterior thread for elegantly solving spacing problems in astrophotography. Use this extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners. All metal construction and anodizing aluminium process, durable for long time use. The required spacing can be achieved by combining several extenders of differing lengths,you can use 1 piece, 2 pieces , 3 pieces or 4 pieces of the extension rings as you like.

Reviews

Global ratings 5
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Type of review

Revainrating 5 out of 5

Well made and work perfectly

I can't find anything to slight about these spacers: the threads are cut nicely and they thread in smoothly and snugly and the finish is a nice and consistent dull matte. Each spacer is individually packaged in a small Zipp-lock type of bag and the set arrived in a small box. The dimensions are as stated, so overall these worked perfectly for my imaging train spacing needs. Affordable and a good value. Highly recommended.

Pros
  • Sturdy, metal, high quality, do the job.
Cons
  • The kit may not be compatible with all types of eyepieces or camera adapters

Revainrating 5 out of 5

Extentions and T-Thread (48mm)

Use these T-Thread (48mm) 2" to extend back focus or ad length to 2" (48mm) tubes for astronomy. Work great.Do not tighten them too much and use just a hint of lubricant to keep them from binding or galling. Use quality strap wrench if you over tighten them with your fingers.

Pros
  • 10 x 1.2 x 5.3 inches
Cons
  • The kit may not be suitable for beginner users who are still learning how to use their telescope and its accessories

Revainrating 2 out of 5

Lock up easily good for me

Have had 2 lengths lock up tighter than a drum when connected. Not cross threaded, as was subsequently able to unlock (froze, used strap wrenches) and lube and seem to work.

Pros
  • Exactly what I needed
Cons
  • The various length options make it difficult to quickly and easily switch between different set-ups

Revainrating 5 out of 5

Excellent finish and threads

Threads are clean and parts glide smoothly when screwing/unscrewing. black anodized finish is uniform and fully coated. Baader Planetarium MPCC Mark III has slight resistance in threads when attaching extension tubes, but it works.The only suggestion for improvement, or an upgraded version, would be a matte finish on the inner surfaces. I doubt it would make a huge difference as the threads already break up the reflections quite a bit. I suppose one could coat the inside with matte black Krylon

Pros
  • Well made and reasonably priced.
Cons
  • The kit requires additional maintenance and cleaning to ensure optimal performance

Revainrating 5 out of 5

Precisely Made best in my review

I purchased a 2" GSO Barlow (sold under several names including TPO and Zhummel) that has a detachable lens cell. I wanted to go all threaded connections from scope to Barlow to camera. These M43 rings did the trick. I only needed one ring, but can use one of the others to vary the Barlow to sensor spacing to get a bit more or less than 2x.Well made and threads match other China made accessories, unlike some German Baader products. The gloss finish does appear to cause a problem with internal…

Pros
  • Camera & Photo
Cons
  • The cost of purchasing multiple extension tubes can add up quickly for users with multiple telescopes