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Item #:
11483692
Alstar 1.25 Inch 90Degree Diagonal Prism with Optical Prism Instead Mirror | Image Clear and Sharp, 1.25 inch Eyepiece Adapter, Observe Comfortably,
Item #:
11483692
NZD 69
Price Details
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What Stands Out
Clear Image Quality
The Alstar prism design enhances image clarity by using optical prisms instead of mirrors, delivering exceptionally sharp views for astronomical observations.
1.25 Inch Adapter
Compatible with standard 1.25 inch eyepieces, ensuring versatility and ease of use across various astronomical telescopes for diverse stargazing experiences.
Durable Brass Construction
The robust brass rings enhance durability and provide a secure fit, ensuring long-lasting performance and reliable adjustments during extended use in the field.
Product Details
| Eye Piece Lens Description | Prism |
| Mount | Altazimuth Mount |
| Focus Type | Manual Focus |
| Power Source | Manual Operation |
| Finderscope | Reflex |
| Compatible Devices | Refractor, Schmidt-Cassegrain, Maksutov-Cassegrain |
| Coating | Multi-Coated |
| Field Of View | 90 degrees |
| Zoom Ratio | 1x |
| Additional Features | 90-degree erecting prism for upright and corrected image viewing |
| Objective Lens Diameter | 1.25 |
| Item Dimensions D x W x H | 2.1"D x 2.8"W x 4.4"H (5.3 x 7.1 x 11.2 cm) |
| Item Weight | 4.6 ounces (130.41 grams) |
| Brand | A ALSTAR |
| Unit Count | 1 Count |
| Manufacturer | A ALSTAR |
| Built-In Media | 90-degree Erecting Prism |
| Model Number | SKU_AM_EP1D90AR |
| Manufacturer Part Number | SKU_AM_EP1D90AR |
| Telescope Mount Description | Altazimuth Mount |
| Product Dimensions (L x W x H) | 2.1"D x 2.8"W x 4.4"H (5.3 x 7.1 x 11.2 cm) |
Who Should Buy?
-
Amateur Astronomers
Great for beginners looking to improve image clarity and orientation during stargazing sessions with telescopes.
-
Nature Observers
Ideal for birdwatchers and outdoor enthusiasts wanting a clear and accurately oriented view of distant objects.
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Educational Purposes
Perfect for schools and universities teaching astronomy, providing clear visuals for learning about celestial objects.
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Professional Astrophotographers
May not meet high standards for image quality and precision needed for serious astrophotography projects.
Product Description
Alstar 1.25 Inch 90Degree Diagonal Prism with Optical Prism Instead Mirror | Image Clear and Sharp, 1.25 inch Eyepiece Adapter, Observe Comfortably, 89% Reflection for a Bright Image, Metal Barrel
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is an Alstar 1.25 90-degree Erecting Prism and how does it work?
Answer: The Alstar 1.25 90-degree Erecting Prism is an optical device designed to invert and erect images, providing a clear and sharp view without the distortion common with regular mirrors. It utilizes a combination of prisms to redirect light effectively, ensuring that the images viewed through telescopes or other optical instruments appear upright. This makes it ideal for terrestrial observations, where accurate representation of the viewed scene is crucial. -
Question:
What are the main benefits of using an erecting prism over a regular mirror?
Answer: Using an erecting prism offers several advantages over traditional mirrors. Firstly, the images produced by a prism are typically less distorted and more color-accurate, making them better suited for detailed observations. Additionally, since the image remains upright, it eliminates the confusion that can arise from inverted visuals, enhancing the overall viewing experience whether for astronomy or nature watching. -
Question:
Can the Alstar 1.25 90-degree Erecting Prism be used with all telescopes?
Answer: The Alstar 1.25 90-degree Erecting Prism is compatible with most telescopes that support 1.25-inch eyepieces. This versatility allows it to be used across a wide range of models, enabling users to enjoy clear and crisp images without needing specialized attachments. Always check your telescope's specifications to ensure compatibility, but generally, it is designed for broad usability. -
Question:
What types of observation are best suited for the Alstar 1.25 Erecting Prism?
Answer: The Alstar 1.25 Erecting Prism excels in terrestrial observation and nature watching, where a precise and upright image is essential. For example, birdwatchers or hikers using telescopes for distant views can benefit significantly from the clarity it provides. It can also enhance stargazing experiences by offering sharper details in celestial observations, depending on the particular setup. -
Question:
Is the image quality consistent across different lighting conditions?
Answer: Yes, the Alstar 1.25 Erecting Prism provides consistent image quality across various lighting conditions. Its construction minimizes light loss and distortion, ensuring that even in lower light settings, users can expect sharp and vivid images. This makes it particularly advantageous for dusk or dawn observations, where good light quality is critical for seeing fine details in landscapes or astronomical objects. -
Question:
How do I maintain the Alstar 1.25 Erecting Prism for best performance?
Answer: To maintain the Alstar 1.25 Erecting Prism, keep it clean and avoid exposing it to harsh environments. Regularly clean the lenses with a soft cloth and lens cleaner to prevent dust and smudges from degrading image quality. Also, store it in a protective case when not in use to safeguard against scratches and impact damage, ensuring it remains in optimal condition for your observations. -
Question:
What materials are used in the construction of the Alstar Erecting Prism?
Answer: The Alstar 1.25 Erecting Prism is crafted from high-quality optical glass, which is designed to offer superior clarity and minimal distortion. The precision-engineered prisms contribute to enhanced light transmission, improving the overall viewing experience. This construction allows for robust performance, ensuring that the prisms can withstand regular use in diverse observational settings. -
Question:
Is the Alstar 1.25 Erecting Prism suitable for astrophotography?
Answer: While the Alstar 1.25 Erecting Prism is primarily designed for visual observation, it can be used in astrophotography with some limitations. Since it provides an upright image, it helps when framing your shots, but taking long-exposure astrophotos may require additional adjustments to your setup for optimal results. Users should experiment to find the best configuration for their astrophotography needs. -
Question:
Can beginners use the Alstar 1.25 Erecting Prism effectively?
Answer: Absolutely! The Alstar 1.25 Erecting Prism is user-friendly and ideal for beginners. Its design allows newcomers to enjoy telescope observations without getting overwhelmed by technical details. As it provides a clear, erect image, users can focus on learning about astronomy or nature while enjoying an enhanced viewing experience, making it an excellent choice for anyone starting out. -
Question:
Where can I buy the Alstar 1.25 90-degree Erecting Prism?
Answer: You can purchase the Alstar 1.25 90-degree Erecting Prism from Ubuy in New Zealand. Ubuy offers a reliable platform to find this product and other optical accessories, ensuring that you have access to quality equipment for your observation needs.
A ALSTAR Diagonals SKU_AM_EP1D90AR Editorial Review
The Alstar 1.25 inch 90-Degree Erecting Prism has garnered a mix of impressions from users, primarily highlighting its decent performance and value for the price. Several users have appreciated its functionality for nighttime use, particularly when observing celestial bodies like the moon and stars. However, it has also drawn some criticisms for daytime observations, especially during bird watching, where users reported the appearance of a peculiar rainbow blob in the middle of images. This effect seems to stem from the prism's limited glass coatings, leading to less clarity compared to higher-end options like the William Optics prisms. Despite these concerns, some customers have found effective ways to utilize the prism, such as coupling it with solar telescopes to minimize issues with bright light and ghost images. For those on a budget, the Alstar prism presents an acceptable choice, particularly for basic observational needs. However, more discerning users may wish to invest in higher-quality options for optimal performance. Overall, the prism serves its purpose adequately for casual users but may leave those with specific viewing preferences wanting more. **
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Pros
- Good value for the price.
- Effective for nighttime celestial viewing like the moon and stars.
Cons
- Rainbow blob effect during daytime observations, particularly for bird watching.
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“Easy to order, easy to track and the product is great to use. Also, the person-to-person (not automated) phone call I got to confirm that I'd received the item was wonderful ??”
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NZD 69
Order now and get it around Saturday, August 22
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Features & Benefits
- Transforms your telescope for nature observation.
- Provides a clear and sharp image with optically processed BK7 glass.
- Compatible with standard 1.25 inch eyepieces and filters.
- Ideal for both daytime and nighttime use.
- Includes dust cap and plug for long-term protection.
- Durable construction with ABS plastic housing and metal barrels.
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