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GS-TTB04 7x50 Porro Binocular

GS-TTB04 7x50 Porro Binocular

Order Quantity (Whole Optical Glasses)
Regular price $18.00 USD
Regular price Sale price $18.00 USD
Sale Sold out
Shipping calculated at checkout.


How to place an order

  1. Contact Us: Reach out to us via email at or WhatsApp at +1 832 398 2934.
  2. Proforma Invoice: We will issue a Proforma Invoice detailing your order, including pricing and payment instructions.
  3. Confirm Payment: Confirm your payment as per the Proforma Invoice.
  4. Production: Once payment is confirmed, we will proceed with the production of your order.
  5. Shipping: Your order will be shipped according to the agreed-upon lead times and shipping method.
  6. Contact Us: If you have any questions or need assistance at any stage of the ordering process, our customer service team is available to help.

What is OEM and ODM process?

Product Development Process

1. Ascertain Specifications

The first step in the process is to determine the exact specifications required for the product. This could include dimensions, materials, features, and any other relevant information.

2. Determine OEM/ODM Model

Once the specifications are determined, the manufacturer will assess if they have an existing OEM/ODM basic model that can be used. If not, they will proceed with designing a new product from scratch.

3. Optical Design

If the product requires optical components, such as a camera or lens, the manufacturer will design and submit optical performance values for approval.

4. Verify Optical Performance Approval

Once the optical design is complete, the manufacturer will verify the optical performance approval with the client.

5. Mechanism Design

After the optical design is approved, the manufacturer will move on to designing the exterior of the product. They will submit exterior drawings for approval by the client.

6. Verify Exterior Drawings Approval

Once the exterior drawings are approved, the manufacturer will verify the exterior drawings approval with the client.

7. Calculate Estimate and Prepare Sample

With the specifications and designs approved, the manufacturer will calculate an estimate for the project, including the cost of materials, labor, and any other necessary expenses. They will then prepare a sample estimate to present to the client.

8. Fabricate Sample

If the client approves the estimate, the manufacturer will proceed to fabricate a sample of the product for the client to review.

9. Shift to Quantity Production

Once the sample is approved, the manufacturer will shift to quantity production, manufacturing the agreed-upon number of products for the client.


Contact Information

WhatsApp: +1 (832) 398 2934
WeChat: +86-17623002808


Factory Address: Community 1, Banqiao, Xindu Town, Xindu District, Chengdu City, China
Office Address: No.20-10, Qunhui Road 21, Nan'an District, Chongqing, China

Working Hours

China Mainland Time (GMT+8): Monday to Friday, 9:00 AM to 6:00 PM
United States Eastern Time (GMT-5): Sunday to Thursday, 9:00 PM to 6:00 AM
United States Central Time (GMT-6): Sunday to Thursday, 8:00 PM to 5:00 AM
United States Pacific Time (GMT-8): Sunday to Thursday, 6:00 PM to 3:00 AM

Additional Information

For inquiries, please email:

© 2024 Gushin Optics. All rights reserved.

Can we negotiate the price?

Thank you for considering Gushin Optics. While we typically maintain our pricing, we are open to discussing it, especially based on the quantity of your order. Our margin is generally 13%, and we strive to offer competitive pricing while maintaining the quality of our products. Your satisfaction is important to us, so please feel free to discuss your requirements, and we will do our best to find a suitable solution for you.

What is your price term on Website?

The price term on our website is FOB (Free on Board). This means the price includes all costs up to loading the goods onto the vessel at the specified port. For buyers, FOB offers transparent pricing, control over shipping, potential cost savings, flexibility in shipping arrangements, and reduced risk exposure.

View full details

First of all, Great clarity and performance are features of our BAK4 huge eye-piece binoculars line, which are ideal for nature lovers, sports enthusiasts, and outdoor enthusiasts. Whether you're birdwatching, hiking, or at a sporting event, these binoculars offer an exceptional viewing experience thanks to their superb optics and sturdy construction.

Our BAK4 huge eye-piece binoculars are made with premium BAK4 prisms and multi-coated lenses, which produce crisp, bright images with outstanding contrast and colour fidelity. Even for those who wear glasses, the big eyepieces make for comfortable long-term viewing, and the twist-up eyecups offer individualised eye relief.

The binoculars have a sturdy aluminium alloy shell that is protected from impacts and the weather by rubber armour, providing a secure grip. They are waterproof, fogproof, and appropriate for usage in a variety of weather conditions thanks to nitrogen purging and O-ring sealing.


  • Magnification: 7x
  • Objective Lens Diameter: 50mm
  • Prism Type: BAK4 Porro Prism
  • Lens Coating: Fully Multi-Coated
  • Field of View: 7°, 122m at 1000m, 367ft at 1000yds
  • Exit Pupil Diameter: 6.9mm
  • Exit Pupil Distance: 24.2mm
  • Close Focus Distance: 6.5m
  • Diopter Adjustment: -4 to +4
  • Interpupillary Distance: 56 - 74mm
  • Waterproof/Fogproof: Yes
  • Eyecup Type: Twist-up
  • Dimensions: 190x60x180mm
  • Weight: Approximately 980g

K4 big eye-piece binoculars, we provide OEM services that let you alter the appearance, labelling, and packaging to suit your particular requirements. Retailers, wholesalers, and promotional gift firms wishing to serve their clients with premium optics will find these binoculars to be a great selection because of our wholesale choices, which offer affordable rates for large orders. Get more about our OEM and wholesale solutions by getting in touch with us right now.

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