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CE-AAHR9-94052
Celestron結露ヒータリングは、望遠鏡にとって最も理想的な結露対策です。季節を問わず、湿気の多い夜の観測や撮影を劇的に快適にする、まさに「必須」なアクセサリーです。結露ヒーターリング9.25インチ用はCelestronの9.25インチ・シュミットカセグレンおよびEdgeHD鏡筒専用に設計されています。 既存の補正板保持リングと交換して取り付けるため、鏡筒の外観を損なうことなく完全に一体化します。「ヒーターを家に忘れて観測が台無しになる」といった心配は、もう過去のものです。取り付けは非常に迅速かつ簡単です(詳細は付属のマニュアルをご参照ください)。
革新的な仕組み
結露防止ヒーターリングには以下が付属しています:
システムを強化するEnhance your setup
別売の「Smart DewHeater Controller」との併用を強く推奨します。コントローラーは、ヒーターリング内蔵のサーミスタと自身の環境センサーをフル活用。周囲の温度・湿度、そして補正板自体の温度をリアルタイムに監視し、「結露を防ぐために必要な最小限の熱量」だけを供給します。これにより、電力消費を劇的に抑え、バッテリーの持ちを大幅に延ばすことが可能です。
製品には、コントローラーのヒーター出力ポートへ直接接続するための延長ケーブルが付属しています。他社製コントローラーでの使用も可能ですが、内蔵サーミスタによる高度な自動温度管理機能は、Celestron純正Smart DewHeater Controllerとの組み合わせでのみ真価を発揮します。
さらにフードを併用することもお勧めします。物理的に外気を遮断するフードを併用することで、ヒーターリングが消費する電力をさらに削減でき、より過酷な環境下でも光学系をクリアに保つことができます。
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Q:
The Dew Heater Ring is compatible with 5" or larger Celestron Schmidt-Cassegrain telescopes (SCTs) built since the year 2006. I’m not sure when my SCT was built. How can I determine if the Dew Heater Ring is compatible?
The Dew Heater Ring is compatible with 5" or larger Celestron Schmidt-Cassegrain telescopes (SCTs) built since the year 2006. I’m not sure when my SCT was built. How can I determine if the Dew Heater Ring is compatible?
You can determine if the Dew Heater Ring is compatible with your Celestron SCT by examining the design of its rear cell. This applies to fork mounted optical tubes and optical tubes with dovetail mounting bars. Older generation Celestron SCTs (the C5, C8, C11, and C14) built before the year 2006 are not compatible with the Dew Heater Ring. These older optical tubes have either a flat face or a ribbed face on the rear cell. See photo examples below.

Newer generation Celestron SCTs built in the year 2006 or later are compatible with the Dew Heater Ring. These newer OTAs have a trilobed shape on the rear cell. In addition, newer generation 14" SCTs have a rounded rear cell. See photo examples below. All EdgeHD, RASA, 6” Schmidt-Cassegrain and 9.25” Schmidt-Cassegrain telescopes are compatible with the Dew Heater Ring.


Q:
During installation, I removed the telescope's Schmidt corrector retaining ring. But some of the gasket material underneath the ring is still stuck onto the front cell of the telescope. What should I do?
During installation, I removed the telescope's Schmidt corrector retaining ring. But some of the gasket material underneath the ring is still stuck onto the front cell of the telescope. What should I do?
For the Dew Heater Ring to seat properly against the Schmidt corrector, all the gasket material should be removed. For most telescopes, the gasket material can be removed with little to no force. However, some units may have some gasket material stuck onto the front cell due to seepage from the glue used during assembly. If any gasket material is adhered firmly to the front cell, carefully peel or scrape it away. When you do this, make sure to use the included paper installation shield to keep particles off the Schmidt corrector lens. If you use a knife or other tool to remove the gasket material, be very careful to avoid coming into contact with the Schmidt corrector. Also, be sure the optical tube is pointing up when doing this (as shown in the manual during assembly) so the Schmidt corrector itself cannot easily shift its position in the cell.
Q:
When I am using the Dew Heater Ring in “stand-alone” mode by applying power directly to the ring (instead of using an optional Smart DewHeater Controller) that the heating element gets quite hot. Can this affect optical performance since the edge of the corrector will be warmer than the center?
When I am using the Dew Heater Ring in “stand-alone” mode by applying power directly to the ring (instead of using an optional Smart DewHeater Controller) that the heating element gets quite hot. Can this affect optical performance since the edge of the corrector will be warmer than the center?
For each of the Dew Heater Rings, we determined the amount of power required to heat the Schmidt corrector to keep it clear under very heavy dew conditions and engineered the circuitry accordingly. When used in “stand-alone” mode, the heater ring always operates at this maximum power, so the corrector will stay free from dew under virtually all environmental conditions. For smaller telescopes, this does not have a significant effect on optical performance, since not much heat is needed to keep the glass dew-free. However, on the 11” and 14” models, quite a bit of heat is required to keep dew from forming near the center of the Schmidt corrector around the secondary mirror under heavy dew conditions. Because of this, when operating at full power in stand-alone mode, there may be some slight degradation of optical performance for the 11” and 14” models under certain conditions. This is in no way different than other heating bands or straps. We highly recommend using one of the optional Celestron Smart DewHeater Controllers with these larger Dew Heater Rings, as the controller will only heat the corrector as dew conditions warrant, and no loss of optical performance will occur. We also recommend using an optional Celestron Aluminum Dew Shield with the 11” and 14” models, as the Dew Heater Rings (with optional controller) will then not need nearly as much power to heat the corrector to keep the optics clear.
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