Blue Fireball Filter Drawer with M48/M42 Threads and Extra Filter Holder - For 2" Mounted or 36mm Unmounted Filters
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.
Blue Fireball’s filter drawer #P-23 makes it easy to insert and remove a 2" mounted or a 36mm unmounted filter into your optical train between your camera and telescope. It uses a strong magnetic holder for a precise, secure, and repeatable fit. This device is perfect for imagers who want to quickly swap out filters without using large and heavy filter wheels. This drawer has an optical length of 16.4mm.
The Blue Fireball filter drawer # P-23 is the same as the # P-22 drawer which holds a single mounted 2-inch filter with standard M48x0.75 threads. 2" filters with a cell thickness (height) of up to 8mm and a male thread length of up to 2.7mm will comfortably fit inside the drawer. Each filter drawer comes with two 2" filter holders. Additional filter holders are available separately as well.
However, this item includes two additional mounting rings that allow you to replace the 2" filters with 36mm unmounted filters. To use 36mm filters instead of 2" filters, simply mount your 36mm filter in the mounting ring (washers and screws are included for this) and screw the mounting ring with the filter into the M48 female thread on the filter holder/slider.
The filter drawer has an M42x0.75 external thread on the camera side and a M48x0.75 internal thread on the telescope side. Blue Fireball, Baader Planetarium, and ZWO offer adapters that you can purchase separately if you want to adapt the telescope side of the drawer to an M42 T Thread or if you want to adapt the camera side to an M48 thread.
The filter drawer and slider are made of precision CNC-machined aluminum in a flat black anodized finish. The total assembly (filter drawer plus holder) weighs 3oz without a filter.
Also included are two 1mm thick unthreaded spacers (one for either side) that can sit over M42 and M48 male threads to provide some degree of spacing and/or orientation control.
Finally, please note that the M48x0.75 female thread on the telescope side does not have an internal stop.
Blue Fireball also offers filter drawers for 1.25" mounted filters separately. The filter drawer housing is the same in all 3 versions, so you can use your 1.25" Blue Fireball filter holder/slider in this drawer as well, allowing you to mix and match 1.25", 36mm or 2" filters in your imaging train with the same drawer just by swapping the filter holders.
Specifications:
- Dimensions: 66mm wide x 60.7mm tall
- Total thickness (including male T Thread): 20.4mm
- Optical length: 16.4mm
- Length of male T/T2 thread on drawer (camera side): 4mm
- Male thread specification: M42x0.75
- Length of female M48 thread on drawer (telescope side): 2.8mm
- Female thread specification: M48x0.75
- Length of female 1.25" filter thread on filter holder: 2.7mm
- Female 2" filter thread specification: M48x0.75
- Weight: 3.0oz
Other Information
- Country of Manufacture: China
Blue Fireball’s filter drawer #P-23 makes it easy to insert and remove a 2" mounted or a 36mm unmounted filter into your optical train between your camera and telescope. It uses a strong magnetic holder for a precise, secure, and repeatable fit. This device is perfect for imagers who want to quickly swap out filters without using large and heavy filter wheels. This drawer has an optical length of 16.4mm.
The Blue Fireball filter drawer # P-23 is the same as the # P-22 drawer which holds a single mounted 2-inch filter with standard M48x0.75 threads. 2" filters with a cell thickness (height) of up to 8mm and a male thread length of up to 2.7mm will comfortably fit inside the drawer. Each filter drawer comes with two 2" filter holders. Additional filter holders are available separately as well.
However, this item includes two additional mounting rings that allow you to replace the 2" filters with 36mm unmounted filters. To use 36mm filters instead of 2" filters, simply mount your 36mm filter in the mounting ring (washers and screws are included for this) and screw the mounting ring with the filter into the M48 female thread on the filter holder/slider.
The filter drawer has an M42x0.75 external thread on the camera side and a M48x0.75 internal thread on the telescope side. Blue Fireball, Baader Planetarium, and ZWO offer adapters that you can purchase separately if you want to adapt the telescope side of the drawer to an M42 T Thread or if you want to adapt the camera side to an M48 thread.
The filter drawer and slider are made of precision CNC-machined aluminum in a flat black anodized finish. The total assembly (filter drawer plus holder) weighs 3oz without a filter.
Also included are two 1mm thick unthreaded spacers (one for either side) that can sit over M42 and M48 male threads to provide some degree of spacing and/or orientation control.
Finally, please note that the M48x0.75 female thread on the telescope side does not have an internal stop.
Blue Fireball also offers filter drawers for 1.25" mounted filters separately. The filter drawer housing is the same in all 3 versions, so you can use your 1.25" Blue Fireball filter holder/slider in this drawer as well, allowing you to mix and match 1.25", 36mm or 2" filters in your imaging train with the same drawer just by swapping the filter holders.
Specifications:
- Dimensions: 66mm wide x 60.7mm tall
- Total thickness (including male T Thread): 20.4mm
- Optical length: 16.4mm
- Length of male T/T2 thread on drawer (camera side): 4mm
- Male thread specification: M42x0.75
- Length of female M48 thread on drawer (telescope side): 2.8mm
- Female thread specification: M48x0.75
- Length of female 1.25" filter thread on filter holder: 2.7mm
- Female 2" filter thread specification: M48x0.75
- Weight: 3.0oz
- 1x 2" filter holder
- 2x 2" filter drawers
- 2x spacers
- 1x 1mm thick unthreaded spacer for M42 male threads
- 1x 1mm thick unthreaded spacer for M48 male threads
- 2x 36mm unmounted filter holders, mounting screws and washers
- Small Philips screwdriver required for assembly is not included
Blue Fireball’s filter drawer #P-23 makes it easy to insert and remove a 2" mounted or a 36mm unmounted filter into your optical train between your camera and telescope. It uses a strong magnetic holder for a precise, secure, and repeatable fit. This device is perfect for imagers who want to quickly swap out filters without using large and heavy filter wheels. This drawer has an optical length of 16.4mm.
The Blue Fireball filter drawer # P-23 is the same as the # P-22 drawer which holds a single mounted 2-inch filter with standard M48x0.75 threads. 2" filters with a cell thickness (height) of up to 8mm and a male thread length of up to 2.7mm will comfortably fit inside the drawer. Each filter drawer comes with two 2" filter holders. Additional filter holders are available separately as well.
However, this item includes two additional mounting rings that allow you to replace the 2" filters with 36mm unmounted filters. To use 36mm filters instead of 2" filters, simply mount your 36mm filter in the mounting ring (washers and screws are included for this) and screw the mounting ring with the filter into the M48 female thread on the filter holder/slider.
The filter drawer has an M42x0.75 external thread on the camera side and a M48x0.75 internal thread on the telescope side. Blue Fireball, Baader Planetarium, and ZWO offer adapters that you can purchase separately if you want to adapt the telescope side of the drawer to an M42 T Thread or if you want to adapt the camera side to an M48 thread.
The filter drawer and slider are made of precision CNC-machined aluminum in a flat black anodized finish. The total assembly (filter drawer plus holder) weighs 3oz without a filter.
Also included are two 1mm thick unthreaded spacers (one for either side) that can sit over M42 and M48 male threads to provide some degree of spacing and/or orientation control.
Finally, please note that the M48x0.75 female thread on the telescope side does not have an internal stop.
Blue Fireball also offers filter drawers for 1.25" mounted filters separately. The filter drawer housing is the same in all 3 versions, so you can use your 1.25" Blue Fireball filter holder/slider in this drawer as well, allowing you to mix and match 1.25", 36mm or 2" filters in your imaging train with the same drawer just by swapping the filter holders.
Specifications:
- Dimensions: 66mm wide x 60.7mm tall
- Total thickness (including male T Thread): 20.4mm
- Optical length: 16.4mm
- Length of male T/T2 thread on drawer (camera side): 4mm
- Male thread specification: M42x0.75
- Length of female M48 thread on drawer (telescope side): 2.8mm
- Female thread specification: M48x0.75
- Length of female 1.25" filter thread on filter holder: 2.7mm
- Female 2" filter thread specification: M48x0.75
- Weight: 3.0oz
Other Information
- Country of Manufacture: China
- 1x 2" filter holder
- 2x 2" filter drawers
- 2x spacers
- 1x 1mm thick unthreaded spacer for M42 male threads
- 1x 1mm thick unthreaded spacer for M48 male threads
- 2x 36mm unmounted filter holders, mounting screws and washers
- Small Philips screwdriver required for assembly is not included
Blue Fireball Filter Drawer with M48/M42 Threads and Extra Filter Holder - For 2" Mounted or 36mm Unmounted Filters