OPTOLONG 1.25" UV/IR Cut Blocker Filter Astronomical Telescope Filters for Deep Sky and Planetary Photography

$162.99 $115.99 SAVE 29%
Add to Wishlist
About this item

OPTOLONG 1.25" UV/IR Cut Blocker Filter Astronomical Telescope Filters for Deep Sky and Planetary Photography

  • Application: Camping

Precise details:


UV/IR Cut filters are IR and UV cut-off filters for astronomical photography, which can effectively prevent interference from IR and UV rays and provide focus and dust protection. UV-IR filters are used in all digital cameras, CCD cameras and webcams for photo processing technology. High transmittance visual band (420 nm ~ 680 nm), including H-Alpha (656 nm), S-II (672 nm) and NII lights. They are used to concentrate light and protect against dust.






Metal Frame Material

Aviation Aluminum



Peak transmittance

Tmax>95% @ 420nm-680nm

Blocking Area

>OD3(0.1%) @ 300-1100nm

Filter glass thickness

1.85mm to ensure high flatness of 1/4λ during optical processing.

Glass material


Surface finish




The main uses and real shot effect diagram (uses):

1, Suitable for use with DSLR and CCD, can effectively inhibit the interference of UV and IR

2, For astronomy photography inside with monochrome CCD use

3, For DSLR conversion for astrophotography


- Optical high precision double-sided polishing to ensure parallelism greater than 30" and high flatness 1/4λ to avoid halos.

- Precision double-sided optical coating, not a two-piece bonding type, effectively increases transmittance and cut-off depth.

- Electron Evaporation Technology

- Ion Source Assisted Coating (IAD) technology, which increases the density of the film layer and ensures that the temperature drift of the filter wavelength due to temperature is minimized.

-High uniformity planetary wheel coating fixture to improve filter wavelength uniformity.

Metal frame:

Thread: M48*0.75

High quality aircraft aluminum

Precision CNC one-piece molding

Optical instruments professional fine sandblasting and anodic treatment, matte finish inside the frame to prevent reflections.

Font laser engraving - no fading, color fading


Plastic box material: PP material

Plastic box lining: high pressure white EVA material

Paper box: 340g silver cardboard

Carton liner: high density foam

Optical curves:

This filter cuts off the visible part of the 400-700nm band and ensures high transmission of the nebula emission line. The transmittance is up to 95%, while effectively cutting out interference in the UV and IR bands.

Package included:

1 * OPTOLONG UV/IR Cut Blocker Astronomical Telescope Filters

Thread M48*0
Application Camping
Paper box 340g silver cardboard
Carton liner high density foam
Plastic box material PP material
Plastic box lining high pressure white EVA material
(n/a)OPTOLONG 1.25
Shipping information

(1) FREE Shipping 10 - 15 business days, (2) Standard Shipping 7 - 12 business days.

Shipping and Delivery Estimates

We ship in-stock orders as soon as possible. This is often within two business days, but there are situations where it may take longer. All estimates are based on business days.


(1) The shipping time mentioned above refers to the estimated time of business days that the shipment will take after an order has been shipped.

(2) Business days do not include Saturday/Sunday and any public holidays.

(3) These estimates are based on normal circumstances and are not a guarantee of delivery times.

(4) We are not responsible for the failures or delays in delivery resulting from any force majeure event, such as natural disaster, bad weather, war, customs issues, and any other event beyond our direct control.

Return and exchanges

Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can't offer you a refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

for more information please visit our Refunds & Returns Policy page.