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TS-Optics 1.25" Gray Filter Neutral Density ND 64 - 1.56% pass filter

Name: TS-Optics 1.25" Gray Filter Neutral Density ND 64 - 1.56% pass filter
Brand: -TS Zubehör
SKU: TSND64
Price: 22 EUR

The 1.25" gray filter or ND filter has 64x attenuation. The filter reduces the image brightness to 1.56%.

There is no tinting of the image, the brightness is reduced evenly.

Precise filter cell made of metal with thread on both sides, thus filter combinations are also possible.

Homogeneous filter glasses with plane-parallel surfaces and very good antireflection coating for high sharpness and contrast

1.25" filter thread for all common eyepieces and adapters

Plastic storage and transport box

Manufacturer: -TS Zubehör

Product number: TSND64

EUR 22,00

incl. 19 % VAT (DE)

The VAT indicated refers to that applicable in Germany. After logging in, the VAT amount is adjusted to the applicable VAT of the stored delivery country. Therefore, the final price may vary accordingly.

excl. 6.95 € shipping costs (DE)

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TS-Optics 1.25" Gray Filter Neutral Density ND 64 - 1.56% pass filter

The 1.25" gray filter or ND filter has 64x attenuation. The filter reduces the image brightness to 1.56%.

There is no tinting of the image, the brightness is reduced evenly.

Precise filter cell made of metal with thread on both sides, thus filter combinations are also possible.

Homogeneous filter glasses with plane-parallel surfaces and very good antireflection coating for high sharpness and contrast

1.25" filter thread for all common eyepieces and adapters

Plastic storage and transport box

Details..
Technical data..
In the box..

TS Optics 1.25" Gray Filter

Gray filters are used to reduce image brightness, for example on the moon or on bright planets. This prevents over-illumination effects at the moon and at planets and during daytime observation. The filter is also suitable for double star observations with a particularly bright component.

The adaptation:

The filter is simply screwed onto the 1.25" filter thread of the eyepiece or adapter. With transition adapters, the filter can also be screwed in front of the camera lens (see accessory recommendations).

What does the ND value mean:

The ND value provides information about the attenuation factor. The higher the value, the stronger the attenuation factor. However, there are two versions:

1. Logarithmic scale

This is used with our older gray filters, but also for solar filter foil. The transmission is calculated here as 1/10^ND, whereby the ND value may have to be provided with a comma:

ND03 - the light is reduced to 1/10^0.3 times, i.e. 1/2 (transmission 50%)

ND06 - the light is reduced to 1/10^0.6 times, i.e. 1/4 (transmission 25%)

ND09 - the light is reduced to 1/10^0.9 times, i.e. 1/8 (transmission 12.5%)

Advantages are the large range and the possibility to easily add the ND values of combined filters.

2. Linear scale

This is used with our newer gray filters. The transmission is simply calculated according to 1/ND:

ND16 - reduction by 16 times - light transmission is 6.25%

ND32 - reduction by 32 times - light transmission is 3.13%

ND64 - reduction by 64 times - light transmission is 1.56%

The advantages are the simple calculation of the attenuation by individual filters and thus the direct calculation of the extension of exposure times.

Practical tip from Teleskop-Service:

Due to filter threads on both sides, you can combine the grey filter with 1.25" colour filters, thus you can achieve an increase in contrast and a reduction of brightness.

You can also screw two gray filters together to further adjust and enhance the damping effect.

Filter type:	Gray filter
Filter effect:	No tinting
Attenuation factor:	ND64 - 1.56% passband
Filter thread:	1.25" (M28) filter thread on both sides (male female)
Height of filter cell:	8 mm (without external thread)
Length of filter thread:	4 mm