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IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）
IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）

IDAS NGS1 DRT（For Canon EF-EOSR drop-in mount adapter）

IDAS
ID-61059
特價
新品
現貨

HK$ 1656


+ -
圖片僅作供參考，並不代表產品實物及所包括配件。
Pictures shown are for illustration purpose only and may not be an exact representation of the product and accessories included.
  • 詳細內容

原價：HK$1840

For Canon EF-EOSR drop-in mount adapter & Meike MK-EFTR-C (EF-R) & MK-EFTE-C (EF-E) drop-in mount adapters：Installation Manual

星雲和星系，更清晰、更忠實
——IDAS 的 NGS1 濾鏡是一款均衡的 LPS（光污染抑制）濾鏡，覆蓋整個可見光範圍，在抑制光污染的同時，實現了高水平的自然色彩還原。它

能夠有效遮蔽城市地區的強烈人造光（鈉燈和汞燈），同時穩定地透射 Hα、OIII 和 SII 等天體的發射線光譜。它可以清晰地捕捉星系、星雲、星團和銀河係等各種天體，而不會出現色彩偏差。

此型號專為「DRT 型」設計，相容於佳能原廠 EF-EOSR 嵌入式轉接環和美科 EF-R/E 嵌入式轉接環，
實現高效能、高畫質的後置配置，無需在每次更換鏡頭時更換濾鏡。

[特點]
・自然光污染減少設計（有效抑制黃色至橙色的路燈）
・精美再現星星的顏色和星雲的漸變
・兼容佳能 / 名家卡口適配器
・無論使用何種鏡頭，均可巧妙地安裝在後側
・日本製造，高精度光學玻璃，AR 塗層

[規格]
・濾鏡類型：DRT型（僅適用於嵌入式後置卡口）
・有效直徑：45mm
・厚度：2.0mm
・透射特性：減少自然光污染（注重色彩平衡）
・表面處理：二向色塗層 / AR 塗層

・想要在城市地區拍攝星系和星雲同時保持自然色彩的人
・拍攝在減少光線的同時捕捉風景的廣角照片的人污染
・想要在一次拍攝中同時實現色彩還原和對比度的人
・想要使用彩色相機或數碼單反相機欣賞星空和星空攝影的人


Feature 1
The NGS1 is the world-first filter that suppresses both man-made and night glow interferences to the green, orange and red ranges.
Night Glow: OI (557.7nm、630.0nm、636.4nm), NaI (589.0nm、589.6nm)

Feature 2
The NGS1 the successor of the conventional IDAS light pollution cut filters, and thus can suppress the inteference from white LED lights. This filter is also effective against low- and high-pressure sodium lamp pollutions.

Night glow interferenced image (photo taken by Mr. Shigemi Numasawa):


Image ideally processed to reproduce the NGS1:effect


Feature 3
The NGS1 is designed based on the same concept as of the other IDAS light pollution cut filters so that it maxmizes the transfer of the light emissions from various emission nebulae, C2 comae of comet heads and CO+ ionized tails of comet tails as well as coninuous spectrum emissions from space. Its transmittance range is intentionally shifted to the longer wave length side. allowing margins for "the shift tendency towards the shorter wave length side against oblique incidences" typically associated with thin-film interference filters. The NGS1 can almost fully transfer the abovementioned nebular emission lines under the conditions , for example, where the incidence of the parallel flux is kept below 14 degrees, or a lens of the F value 2 or faster (or 1.4 or faster depending on lens) is used before this filter.
.

Feature 4
The NGS1 filter utilizes the IGAD (ion-Gun AssistDeposition) coating technology which has been applied to our coventional light pollution cut filters. The IGAD technology densifies the multi-layers - the heart of interference filters - resulting in the physical properties that cannot be obtained from the conventional multi-layers.
1) Highly durable thin layers of which hardness equals to quartz glasses. Tremendously improved adherence between the substrate and the multi-layers set.
2) Absolutely almost no aging variation in optical spectral characteristics due to temperature and humidity change as far as used in the regular human living environments.

*This product is an interference filter.  Its spectrum characteristics will be subject to the incidence of incoming light. Please carefully read the following instruction for proper use:
When the NGS1 is placed before the lens:
Use a lens having the light incidence angle of 14 degrees or lower (field angle of 34 degrees or lower).
When the NGS1 is placed between the lens and camera:  （applies to IDASmio filters)

When your camera is equipped with an APS-C image sensor and uses a lens with a *back focal distance of 40mm or greater and F value of two or faster, it is possible to hold down the maximum averaged incidence angle of the incoming light ray against the filter within about 14 degrees. Under the conditions of the above mentioned camera, there will be almost no field angle requirements for the lens to be used.

* Please note, however, that the smaller the diameter of the rear lens element is, the more likely the maximum averaged incidence angle would exceed 14 degrees where the transmittance of nebula emission lines could be deteriorated around the perpheral of the image.
28mm F2.8
50mm F2.0　

*This is NOT the flange focal length..