This Baader T2 Dust Cap from Alpine Astronomical is fitted with a female (inner) M42 x 0.75mm thread.

M42 x 0.75mm Female Thread

Related Questions and Answers

Q: 1. Baader and other sellers offer an additional M48 insert with this package. Does B&H offer this?

A: Yes the Alpine Astronomical Baader T-Ring Camera Adapter (Sony E/NEX) includes an M48 thread for more compatibility options.

Q: 2. What items are in the box?

A: The Alpine Astronomical Baader 2x Carl Zeiss Abbe Barlow Lens (1.25") BH #ALZBARLOW • MFR #ZBARLOW comes with the Alpine Astronomical Baader 1.25"/T-2 Click-Lock Eyepiece Holder Adapter BH #ALT208 • MFR #T2-08 and a 2 year aarranty.

Q: 3. What storage container would you recommend for a pair of these filters? Thanks

A: It would be best to use the box the filter comes in or use this Print File box: https://bhpho.to/3uHvHCQ

Q: 4. Does anyone know the range of adjustable width?

A: There are no specification on the manufacture website. I would advise contacting the manufacture direct. Alpine Astronomical Website http://www.alpineastro.com/ Email sales@alpineastro.com

Q: 5. I have a Fuji X-Pro3 and T-Adaptor (for Fuji). Do I need this B&H #ALHTA43T2 in order to connect to the Mark 4 zoom?

A: That is correct, the B&H #ALHTA43T2 adapter is necessary to attach to T Mounts.

Q: 6. Can you please list out the items come with this package $657.00 : 2.6X glasspath compensator and 2 inch nosepiece?

A: In the Box Alpine Astronomical Baader MaxBright II Binoviewer (1.25") Carrying Case Zeiss Micro-Bayonet Mounting Adapter Limited 2-Year Warranty Alpine Astronomical Glasspath Corrector 2.6x for Maxbright/Mark V Binoviewers BH #ALGLASS3 • MFR #GLASS-3 https://www.bhphotovideo.com/c/product/1405373-REG/alpine_astronomical_glass_3_glasspath_corrector_1_2_6_for.html Alpine Astronomical Baader 2" T-2 Nosepiece BH #ALT216 • MFR #T2-16 https://www.bhphotovideo.com/c/product/1406318-REG/alpine_astronomical_t2_16_baader_2_nosepiece.html

Q: 7. Will this fit a M48 X .75 thread?

A: This is an M42 Thread, so it will not fit that threading size.

Q: 8. Is this adapter 8.3 mm long, as shown at the Baader site?

A: Yes the length would be 8.3mm.

Q: 9. in continuation with previous question. So do i need to purchase Alpine Astronomical Baader T-2 90 Prism Star Diagonal Housing separately ?

A: It should come with everything you may need: In the Box Alpine Astronomical Baader MaxBright II Binoviewer (1.25") Carrying Case Zeiss Micro-Bayonet Mounting Adapter Limited 2-Year Warranty Alpine Astronomical Glasspath Corrector 2.6x for Maxbright/Mark V Binoviewers Limited 2-Year Warranty Alpine Astronomical Baader 2" T-2 Nosepiece Limited 2-Year Warranty I dose not come with eyepieces.

Q: 10. With the Barlow attached, this effectively goes between 3.5mm - 10mm, right?

A: With a 2X barlow correct