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Description
DayStar Filters 130mm-Aperture Energy Rejection Filter (170mm Cap Diameter)For Use on Refractor and Maksutov OTAs Reduces Heat Load on Filter Assembly Absorbs or Reflects UV and or IR Light For H alpha, Sodium, Helium D3 Filters Inside Diameter of Cap: 17 cm (6. 692") Daystar Filters ' 130mm Aperture Energy Rejection Filter is designed for on axis use with Refractor and Maksutov style OTAs to reduce the heat load on your filter assembly by absorbing or reflecting UV and or IR light while transmitting light in the desired
- For Use on Refractor and Maksutov OTAs
- Reduces Heat Load on Filter Assembly
- Absorbs or Reflects UV and/or IR Light
- For H-alpha, Sodium, Helium D3 Filters
- Inside Diameter of Cap: 17 cm (6.692")
Daystar Filters ' 130mm-Aperture Energy Rejection Filter is designed for on-axis use with Refractor and Maksutov-style OTAs to reduce the heat load on your filter assembly by absorbing or reflecting UV and/or IR light while transmitting light in the desired spectrum. This ERF can be used with H-alpha, Sodium, and Helium D3 solar filters, but is incompatible with calcium wavelengths.
Choose the ERF aperture size to approximately match your refractor's objective aperture or Maksutov corrector plate. Select the correct filter cap size by measuring the outside diameter of the OTA's dew shield and choose the ERF with the smallest inside diameter that will fit over the dew shield. A set of screws is included to secure the ERF into place. This ERF's cap has an inside diameter of 17 cm (6.692").
UPC: 724696425526
In the Box
DayStar Filters 130mm-Aperture Energy Rejection Filter (170mm Cap Diameter)
- 3 x Set Screws
- Limited 10-Year Warranty
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4.4 ★★★★★
Based on 2332 reviews
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Product Reviews
★★★★★ 5
Can I have Term 2 now?
Format: Kindle
This is by far my favorite book of Lyra's to date. I gobbled this book up so fast, I was so upset I finished it. I know this is going to be a book I reread, just like Fate Hollow Academy.
I loved Fate Hollow Academy, so I was excited when Lyra announced she was taking us readers back to Kalista. Although the characters from Fate Hollow are mentioned several times throughout the book, this book is about Pandora and her love interests in the Demon Realm.
Before you deep dive into this book, definitely look at the trigger warnings before you start. When Lyra says there's dark themes in this book, she meant it. Also, just know this book does end on a cliffhanger and will probably leave you with as many questions as it did me.
Below may contain some minor spoilers, so keep that in mind if you want to keep reading my review.
Pandora's first 2 decades of her life are full of torture, hatred, and confinement in a cellar. That is until her father finds her and brings her into the world she was supposed to live in. Because of her upbringing she wasn't acclimated to the Demon world and the way their society works so when she is offered the chance to go to a Demon Reform Accademy, she accepts it to learn the ways of society and how she is supposed to feed.
Pandora isn't like the other common demons in this world, no. She, like her father Death, are soul-eaters. Pandora is too scared to release her powers because she doesn't want to kill anyone, so she needs to learn how to feed off of a piece of soul instead of taking the whole thing.
Because of who her father is, she's classed as a Noble, and while she doesn't agree with her fellow Noble students, who look down on the "lower" class, she also is faced with 3 Demons who hate her for being a Noble. Theses a lot of back and forth tension which these 3 demons who have issues of their own. One is obsessed with her, and wants to know all of her secrets. One leaks fear all over the place, but also is scared of the "princess" -wink- -wink-. One is a complete drunk who doesn't like her just because he's got family Noble problems.
Don't worry, there are 2 other demons who are just the sweetest towards her. One who will get vengeance for anything done to her, he's got Golden Retriever energy around her and touch her and die energy for anyone around her. Finally, there is one who is friends with her even when the whole school is scared of her, who brings her into his dreams and will create nightmares for those who bother her.
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Reviewed in the United States on June 4, 2024
★★★★★ 4
This was more than I expected...
Format: Kindle
So...I finished this book at nearly 2am! It was just that hard to put down. I loved that it's set in the same world as Fates Hollow but in the future. Poor Pandora has been through so much but there's light at the end of the tunnel for her. She finally meets her dad and it turns out he's amazing. In order to help her learn about demon society and how to control her magic he sends her to the Demon Reform Academy. There she meets 2 awesome demons who help her and care for her. She also sadly meets her 3 tormentors. I will say though that while they do bully Pandora they also rescue her several times and defend her. They too have traumatizing pasts and can't see the good that is in front of them. Of course demon society needs to be shaken up too since that's part of the problem. I really enjoyed this read. I teared up a few times throughout the book but I liked the characters and that ending...well it looks like 3 in denial are going to need to grovel hard.
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Reviewed in the United States on June 1, 2024
★★★★★ 5
MUST READ BOOK!!
Format: Kindle
I was in a huge reading slump, when one of my favorite authors recommended this book in her readers group (The amazing Marie Mistry 🫶) and I absolutely DEVOURED this book. Now I’m in the club crying about having to wait until December for Term 2!
This book is about a girl named Pandora who has suffered a life that nobody would ever wish to have. This book is about Pandora learning how to live, learning about herself and what she really wants. She has a long journey to find out all of these things, but she took the first steps in this book and it was beautiful to read. Some of the men in this book are our dream men, Hunter and Reed 😍 and then we have the men who need some work and who we all really just want to beat up until they admit what they really feel, Skel, Bram and Dexter. But that cliffy was a killer and I absolutely cannot wait until the next book!!
You have written an absolute dream of a book Lyra and I eagerly await the next installment in this series!!!
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Reviewed in the United States on June 7, 2024
★★★★★ 5
Monstrously Sweet
Format: Kindle
This book packs an emotional punch, especially if you’ve experienced childhood trauma (particularly abuse and/or neglect). Alexandra creates these three strong protectors who love her and will do anything to make her feel happy and safe. She started out drawing them when she was a small child, and then transitioned to stories as she grew up. Lucien, Elwin, and Kylo look frightening in their monster forms, but it’s clear that they would never hurt Alexandra, and she has never felt afraid of them. They have very distinct personalities that we get to know better throughout the book. The love and devotion they have for Alexandra is sweet and unwavering.
This is a fantastic and creative story! The world-building is wonderful - it’s a shared world with M. Sinclair, and takes place at a university for supernatural beings. The additional world-building within Alexandra’s story added even more depth and intrigue. The spicy times were 🥵 and it’s more of a medium burn, but it works with the characters and I expect that it’ll pick up quite a bit in the next books.
Monsters Within has a unique way of addressing mental health issues that can come from being abused and neglected. There are some flashbacks to Alexandra’s childhood that provide some insight but they don’t go into heavy details.
I absolutely adored this book and can’t wait for more!
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Reviewed in the United States on March 21, 2022
★★★★★ 4
One of us
Format: Kindle
Alexandra is literally one of us. She's just lucky her fictional men became a reality hahaha. This was a good start to what I know is going to be a great series. This was fast paced and kept me entertained. Im ready for the chaos to slow down a little bit so we can get more into the character development. There's so much happening, I feel like we hardly know anything about anyone BUT that's why this is a series so let's get to the next one!
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Reviewed in the United States on April 19, 2025