---
title: "Telescope Eyepiece Calculator — App Overview"
url: https://marlvel.ai/apps/telescope-eyepiece-calculator
category: Reference
developer: Cederic Schmid
platforms: ios
rating: 1.0 (1 ratings)
pricing: free
report_level: overview
generated: 2026-05-10
last_verified: "2026-05-10T04:00:45.859Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** This is a specialized, privacy-focused reference tool that prioritizes field usability through offline functionality and immediate optical feedback.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Reference |
| Rating | 1.0 ★ (1) |
| Pricing | free |
| Platforms | iOS |
| Latest Version (iOS) | 1.2 |
| Developer | Cederic Schmid |

<!-- SECTION: Summary -->
## What is Telescope Eyepiece Calculator?

Telescope Eyepiece Calculator is an offline utility designed for astronomers to calculate optical performance metrics like magnification, exit pupil, and true field of view. It provides real-time feedback and visual warnings for magnification limits, helping users optimize their telescope and eyepiece configurations.

<!-- SECTION: Key Features -->
## Key Features

- **Optical Calculations**: Provides real-time calculation of magnification, exit pupil, TFOV, and f-ratio based on telescope and eyepiece inputs.
- **Visual Performance Warnings**: Uses color-coded badges to alert users to potential issues like over-magnification or suboptimal exit pupils.
- **Equipment Customization**: Supports custom eyepiece types, Barlow/Reducer multipliers, and saving a default equipment setup.
- **Offline-First Design**: Functions entirely offline with a night-friendly interface and haptic feedback for field use.

<!-- SECTION: Target Audience -->
## Who is it for?

Serious amateur astronomers and stargazers looking for a quick, offline tool to plan their observation sessions.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/telescope-eyepiece-calculator/id6751347841?uo=4)
- [Full Intelligence Report](https://marlvel.ai/apps/telescope-eyepiece-calculator)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/telescope-eyepiece-calculator).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*