Blue Fireball M56x0.75 Female & M48x0.75 Female to T/T2 M42x0.75 Male Thread Adapter

Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
Description/Uses:
- Photo adapter for Takahashi FC-60 refractor with T/T2 M42 male threads.
- Features an M56x0.75 female thread on one side and an M42x0.75 male thread on the other side.
- Recessed 10mm below the M56 female thread is an M48x0.75 female filter thread
Features:
- Precision machined, black anodized aluminum
Specifications:
- Total length = 24.5mm (0.96")
- M56 female thread specification = M56x0.75
- Length of M56 female thread (including unthreaded undercut) = 10mm (0.39")
- M48 female thread specification = M48x0.75
- Length of M48 female thread (including unthreaded undercut) = 5mm (0.20")
- Internal clearance for M48 thread = 55mm (2.16")
- M42 T/T2 male thread specification = M42x0.75
- Length of M42 male thread (including unthreaded undercut) =3.5mm (0.14")
- Optical length = 21mm (0.83")
- Clear aperture = 38.9mm (1.53")
- Maximum outside diameter = 60mm (2.36")
- Weight = 1.3oz
Notes:
- The M42 lock ring has slightly oversized threads so it might feel loose by itself on the M42 male thread. However, it will lock securely against your camera or M42 threaded accessory.
Other Information
- Country of Manufacture: China
Description/Uses:
- Photo adapter for Takahashi FC-60 refractor with T/T2 M42 male threads.
- Features an M56x0.75 female thread on one side and an M42x0.75 male thread on the other side.
- Recessed 10mm below the M56 female thread is an M48x0.75 female filter thread
Features:
- Precision machined, black anodized aluminum
Specifications:
- Total length = 24.5mm (0.96")
- M56 female thread specification = M56x0.75
- Length of M56 female thread (including unthreaded undercut) = 10mm (0.39")
- M48 female thread specification = M48x0.75
- Length of M48 female thread (including unthreaded undercut) = 5mm (0.20")
- Internal clearance for M48 thread = 55mm (2.16")
- M42 T/T2 male thread specification = M42x0.75
- Length of M42 male thread (including unthreaded undercut) =3.5mm (0.14")
- Optical length = 21mm (0.83")
- Clear aperture = 38.9mm (1.53")
- Maximum outside diameter = 60mm (2.36")
- Weight = 1.3oz
Notes:
- The M42 lock ring has slightly oversized threads so it might feel loose by itself on the M42 male thread. However, it will lock securely against your camera or M42 threaded accessory.
Description/Uses:
- Photo adapter for Takahashi FC-60 refractor with T/T2 M42 male threads.
- Features an M56x0.75 female thread on one side and an M42x0.75 male thread on the other side.
- Recessed 10mm below the M56 female thread is an M48x0.75 female filter thread
Features:
- Precision machined, black anodized aluminum
Specifications:
- Total length = 24.5mm (0.96")
- M56 female thread specification = M56x0.75
- Length of M56 female thread (including unthreaded undercut) = 10mm (0.39")
- M48 female thread specification = M48x0.75
- Length of M48 female thread (including unthreaded undercut) = 5mm (0.20")
- Internal clearance for M48 thread = 55mm (2.16")
- M42 T/T2 male thread specification = M42x0.75
- Length of M42 male thread (including unthreaded undercut) =3.5mm (0.14")
- Optical length = 21mm (0.83")
- Clear aperture = 38.9mm (1.53")
- Maximum outside diameter = 60mm (2.36")
- Weight = 1.3oz
Notes:
- The M42 lock ring has slightly oversized threads so it might feel loose by itself on the M42 male thread. However, it will lock securely against your camera or M42 threaded accessory.
Other Information
- Country of Manufacture: China

Blue Fireball M56x0.75 Female & M48x0.75 Female to T/T2 M42x0.75 Male Thread Adapter
