SKU: 23178728625

Baader Semi Apo Filter 1.25"

$89.10 $99.00
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Ships within 48 hours · Estimated delivery Aug 27 - Sep 1

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Description

Baader Semi Apo Filter 1.25"Description A filter that removes the need to combine the Neodymium Moon and Skyglow filter with the Fringe Killers to deliver an amazing colour corrected image to achromatic refractors. The Baader Semi Apo does it all in one filter. Baader Semi Apo Filter against violet fringes of refractors 1. 25" cell By selectively filtering out of those parts of the spectrum where the false colour of achromatic refractors is significant, this disturbing effect is

Description

A filter that removes the need to combine the Neodymium Moon and Skyglow filter with the Fringe Killers to deliver an amazing colour-corrected image to achromatic refractors. The Baader Semi-Apo does it all in one filter.

Baader Semi Apo Filter against violet fringes of refractors - 1.25" cell

By selectively filtering out of those parts of the spectrum where the false colour of achromatic refractors is significant, this disturbing effect is reduced. Contrast and image definition are improved. In addition, neodymium-containing glass provides a more neutral colour tone.

This filter delivers a dramatic improvement on sharpness and contrast, even with smaller aperture refractors. The RGB enhancement of the Neodymium substrate layer boosts colour contrasts, for planetary viewing and particularly for Jupiter and Mars.

Differences to Fringe Killer and Contrast Booster:

These two filters have a similar effect. They both reduce false colour, but the image also gets a yellowish touch. In some cases, for example for planetary observation, this is wanted.

The Semi Apo filter causes significantly less yellow tinting. The image has only a slightly warmer touch with a light yellow-green tone. It also has more transmission compared with a standard minus violet filter. It can also be used for deep-sky and double star observation.

The Semi Apo filter is a good addition to the Fringe Killer and the Contrast Booster. It can replace a normal minus violet filter and gives less colour shift.

Specifications

Type of filter: Bandpass-Minus Violet Filter
Transmission range: multiple bands 
Filter substrate thickness: 1 mm
AR-Coating:

Phantom Coating® Group
Filter cell: round cell (LPFC 6 mm)
Weight: 0.057 kg
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 23178728625

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4.9 ★★★★★
Based on 27 reviews
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Verified Purchase
Deb J
Louisville, US
★★★★★ 4
Nice partition for my basement
Color: Beige, Size: B-102''-3 Panel
This 3-panel room divider showed up well-packaged with all the parts and even a little tool for putting it together. The instructions were easy to follow, and while one person can definitely assemble it, having two makes it quicker and less frustrating. It does exactly what I needed—gives quick, easy coverage in an open area. I'm using it in my basement to hide the furnace and water heater, and it works great for that. It looks nice overall, but I picked the beige fabric (which is really more of a tan), and the black frame makes it stand out more than I’d like. A white or lighter frame would’ve blended better. Not sure that I would use it anywhere besides the basement It’s lightweight and pretty sturdy. The wheels make it easy to move, but it does get a bit wobbly, and the panel clips need to be readjusted every time you roll it somewhere new. Still, for the price, it’s a solid buy. I’m happy with it and planning to order another one.
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Reviewed in the United States on June 21, 2025
T
TexNewMex
Alexandria, US
★★★★★ 5
Fantastic
Color: Beige, Size: A-132''W-6 Panel
I am perennially in the process of rearranging, reorganizing, getting ready for yard sales, changing the functions of various rooms, moving everything out of a room to do a deep clean, etc, which means that there is always SOME part of my house, if not the entire thing, that is a disaster zone. Having someone knock on my door triggers a "duck and cover" reflex because it's so embarrassing for anyone to see that I live like this. (I *feel* like I don't, really, because I know that all the various stages are all temporary, but when there's always something temporary going on, it might as well be permanent, you know?) So THANK HEAVENS for a room divider that is not only large enough to divide my uncomfortably long den in half the long way so I can shove all the messy parts up against the back wall -- that is not only simple and attractive and neutral and (this is important) NOT BLACK because I have multiple pets and anything black in this house will be pet-hair-colored within 20 seconds -- that not only has **SIX** panels for lots of options of how I want to divide the space/s -- but is also on WHEELS. Someone out there really does love me, it's true! The panels are stable *enough* - I'm not going to lie and say that nothing is going to knock them over, because I have some balance issues, and I also have cats, and both of those circumstances has resulted in a mess on at least one occasion. But in the cats' defense, they've never dealt with a room partition that didn't hang from the ceiling before; and in my defense, I just grabbed the first thing I could reach on the way down. Not the product's fault in either case. Assembly was a little dicey as I am currently in **bilateral** (oh yes, that's fun) wrist braces, so I had to give up until I had help. But I think if you're able-bodied, you shouldn't have any difficulty. The only down side is, now that I've hidden away all the mess so I can break out the holiday decorations, you know what happens next, right?? That's right... the PERMA-MESS ZONE. Oh no. Oh well. Full item name: Room Divider 132''W Wall Divider for Room Partition (Heavy Duty Base) 6 Panel Partition Room Dividers, Freestanding Room Divider Screen Separation W/Wheel Folding Privacy Screen Panel Space Separator (six panels, beige)
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Reviewed in the United States on December 1, 2025
E
Verified Purchase
E. Leon
San Leandro, US
★★★★★ 3
Difficult assembly, doesn’t fold well, looks good fully open
Color: Grey, Size: B-88''W-4 Panel
The instructions for this divider are very inadequate. After having to redo parts of the assembly, I have finally assembled it. The divider itself seems very nice when it is fully open, however it is not possible to fold it well as all the bars with the wheels go in various directions making it impossible to fold it neatly. And it has a large footprint. It is possible that I did not assemble it fully well because of the lack of adequate instructions. I am not even sure if I will keep it because I need to fold out of the way when nothing in use.
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Reviewed in the United States on April 16, 2026
K
Verified Purchase
K.L
Lexington, US
★★★★★ 4
Slightly challenging build
Color: Beige, Size: A-88''W-4 Panel
This was my second screen set I've purchased, first of this style. Not the easiest to assemble. Lots of pulling and tugging; not a highlight in my day.
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Reviewed in the United States on January 15, 2026
L
LBZ
Battle Creek, US
★★★★★ 5
Commercial grade divider suitable for many needs
Color: Beige, Size: A-132''W-6 Panel
This item will be used at a future event where we need to separate a single locker room into two large areas, without any construction. This divider is perfect for the job because the partitions can be 1 to 6 panels and it will roll into place. When the event is over, the divider will fold/roll away and the locker room will return to its original design. The unit is very heavy, which will ensure that it is sturdy and stable. All the components arrived, wrapped in plastic to prevent damage. The screen material is a woven polyester in a cream color that will occlude any visibility but it may be possible to see shadows on the opposite side. The height is about 6ft, which would require a very tall person to "peep over" the divider. I needed a quality unit for this project and the frame, screens, and mobility will meet the needs. The divider is not the same as the small decorative dividers -- it is more of a commercial grade product, yet tasteful. If you want/need a small divider as an accent piece, this is not the best choice. This item could be used in a medical office, treatment/massage room, to divide an office room into two, or block a hallway in a building.
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Reviewed in the United States on December 2, 2025

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