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In this guide
The G2 110×110mm and 150×150mm field lenses change more than the size of the square you can mark. They also use different focal lengths and are paired with different stand configurations on current G2 listings. This guide separates verified specifications from general optical expectations so you can choose for your actual products—not simply select the larger number.
Quick Answer: Choose 110×110mm or 150×150mm?
Choose the 110×110mm field when your work is mainly rings, jewelry, tags, coins, small logos or other compact pieces and everything fits comfortably within a 110mm square. It is the more focused choice when small-feature work matters more than coverage.
Choose the 150×150mm field when you need a design wider than 110mm, want to arrange more small parts in one flat fixture, or prefer the electric-lift configuration currently paired with this field on the G2 20W and G2 Pro 30W.
Do not choose a field lens for tumbler work from marking-area dimensions alone. Rotary type, object diameter, focal distance, stand clearance and workholding geometry all matter.
View G2 Field Lens Compare G2 20W, 30W & 50WG2 110×110mm vs 150×150mm Field Lens
| Decision factor | 110×110mm field lens | 150×150mm field lens |
|---|---|---|
| Nominal marking field | 110 × 110mm | 150 × 150mm |
| Nominal field area | 12,100mm² | 22,500mm² |
| Verified focal length | 211mm | 261mm |
| Best starting point | Compact parts and fine-feature projects that fit the smaller field | Larger flat graphics and multi-part layouts |
| Current G2 20W pairing | Manual lift with safety shield | Electric lift with safety shield |
| Current G2 Pro 30W pairing | Manual lift with safety shield | Electric lift with safety shield |
| Current G2 Max 50W listing | Not listed as a current machine option | Electric lift with safety shield |
| Main buying risk | A project or fixture may exceed the field | Buying for size alone without testing critical micro-detail or rotary clearance |
How Much More Marking Area Does the 150×150mm Lens Provide?
A field is two-dimensional, so compare area rather than only the side length. The 110mm field covers 110 × 110 = 12,100mm². The 150mm field covers 150 × 150 = 22,500mm². That makes the nominal 150mm field approximately 86% larger by area.
The extra field matters most when a design is physically wider than 110mm or when a fixture can hold several repeatable pieces. For example, a shop may place several small tags in one jig and run a single layout. Whether this saves time depends on loading and scan strategy, so validate the complete cycle instead of judging capacity from field area alone.
Does the 110×110mm Lens Produce Better Detail?
In a general galvo-laser system, field size and focal length can influence spot behavior and how much energy reaches a small feature. A smaller field lens is therefore a sensible starting point when the business depends on compact designs, small text or intricate jewelry work. A larger field lens trades toward coverage.
However, that optical principle is not a license to publish made-up G2 resolution claims. The checked G2 pages do not provide a verified spot diameter for each lens, a minimum readable text size, separate DPI limits, or a percentage difference in energy density. It would be inaccurate to promise that one lens resolves a specific line width or engraves a given percentage deeper.
Detail also depends on focus, material response, artwork quality, fill spacing, speed, power, frequency and surface flatness. Lens choice cannot compensate for a blurred source image, poor focus or a tilted workpiece.
Focal Length: 211mm vs 261mm
Gweike's current G2 focusing guide identifies a 211mm focal length for the 110-field lens and a 261mm focal length for the 150-field lens. The guide measures this distance from the bottom of the field lens to the top surface of the material.
These numbers are not interchangeable. When you change the lens or move to a product of a different height, refocus for the installed optical setup. On the G2 Pro, the two red positioning dots are used as a practical focus aid: adjust the head height until the dots converge. The manual pointer can provide another reference, but the actual setup should follow the current manual and the focusing procedure for the machine.
For the full operating procedure, use the G2 Pro focusing and positioning guide. This article helps you choose the field; the focusing guide explains how to set the installed configuration.
Which Lens Fits Jewelry, Tags, Coins and Batch Work?
Compact, detail-led product catalog
- Rings and small jewelry components
- Coins, small tags and identification plates
- Compact logos, names and serial marks
- Products and fixtures that stay well inside 110 × 110mm
- Buyers comfortable with the current manual-lift pairing
Larger layouts and flat batch fixtures
- Flat graphics wider than the 110mm field
- Several small parts arranged in one fixture
- Larger plates, cards or product faces within the field
- Workflows that benefit from the current electric-lift pairing
- G2 Max 50W buyers using the currently listed configuration
Measure the artwork and fixture, not only the object. A large metal plate may need only a 40mm logo and can fit the smaller field if it can be positioned safely. Conversely, a group of small tags may require the larger field because the complete jig exceeds 110mm.
Leave practical positioning margin. Designing every job exactly to the nominal boundary makes alignment less forgiving. Use the red outline or boundary preview, secure the part, and run low-risk tests before production.
Which G2 Field Lens Is Better for Tumblers and Rotary Engraving?
Neither field size is automatically “the tumbler lens.” A flat marking field describes the usable X-Y area at focus. A rotary turns a cylindrical object through that field, adding mechanical limits that cannot be predicted from 110mm or 150mm alone.
Before ordering a lens-and-rotary combination, check:
- the object's outside diameter and shape;
- whether a chuck or roller is the better holding method;
- the width of the design along the cylinder axis;
- the 211mm or 261mm focal-distance requirement;
- stand, shield and rotary clearance at the required height;
- the rotary product page for the exact field-lens pairing.
As checked on September 17, 2026, the G2 Chuck Rotary page lists 0–80mm diameter with the 110×110mm field and 0–85mm with the 150×150mm field. The G2 Roller Rotary page lists 0–134mm with 110×110mm and 0–85mm with 150×150mm.
How Lens Choice Affects the Current G2 Configuration
The field lens is not presented as an isolated checkbox on every G2 model. Current G2 20W and G2 Pro 30W listings pair the 110×110mm field with a manual lift and the 150×150mm field with an electric lift, both with a safety shield. The current G2 Max 50W product listing presents the 150×150mm electric-lift configuration.
This means your buying decision includes three questions:
Will every planned design and fixture fit?
Measure the largest real layout and add positioning margin. Do not select 110mm if regular paid work exceeds it.
How important is compact-detail testing?
If tiny text, fine jewelry or machine-readable codes drive revenue, request a sample at the required size and material before choosing.
Which lift workflow do you want?
Compare manual and electric adjustment as part of the current package. Do not assume the same lift is included with both field options.
If you are still choosing between laser powers, use the G2 20W vs 30W vs 50W buying guide. Wattage determines a different part of the workflow than field size: power affects material-removal headroom, while the field lens primarily affects coverage and optical geometry.
Can You Change the G2 Field Lens Later?
Gweike sells a dedicated G2 Field Lens, but a lens swap should not be treated like changing a camera filter. The installed lens must match the machine's software field configuration, focal setup and physical clearance.
After a change, verify at least the following before running customer work:
- Confirm that the lens is the correct G2-compatible part and is installed according to Gweike instructions.
- Set the software work area to match the installed 110×110mm or 150×150mm field.
- Refocus for the appropriate 211mm or 261mm focal length.
- Run boundary preview and alignment checks at several field positions.
- Test the actual material and artwork; do not reuse production settings blindly.
- Reconfirm rotary and safety-shield clearance if cylindrical work is planned.
If the software area and installed lens do not match, design scale and placement can be wrong. Keep separate, clearly named device profiles where supported, and document which lens is installed before an operator starts a job.
Final Recommendation
| Your real requirement | Best starting choice | What to verify |
|---|---|---|
| Rings, jewelry, coins, small tags and compact logos | 110×110mm | Smallest detail on the exact material; fixture fits within the field |
| Designs wider than 110mm | 150×150mm | Full artwork dimensions plus alignment margin |
| Several flat parts in one jig | 150×150mm | Real parts per fixture and complete cycle time |
| Tiny text or critical codes | Start by testing 110×110mm | Verified sample readability and acceptance criteria |
| Tumblers, rings or cylindrical products | Depends on the rotary setup | Diameter, geometry, focal clearance and current compatibility listing |
| G2 Max 50W in the current catalog | 150×150mm | Current product-page configuration before purchase |
The 110×110mm lens is not an inferior version, and the 150×150mm lens is not an automatic upgrade. Buy 110mm when compact-detail work defines the business and your layouts fit. Buy 150mm when you can use the additional 86% nominal area for larger designs or practical batch fixtures. For rotary or micro-detail work, make the final decision from a verified sample and compatibility check.
Choose the Complete G2 Setup
Compare the current 20W, 30W and 50W models first, then select the field, lift and rotary configuration that matches your product catalog.
G2 20WG2 Pro 30WG2 Max 50WFrequently Asked Questions
Is a 150×150mm field lens always better than 110×110mm?
No. The 150mm lens offers more layout area, while the 110mm option is a strong fit for compact parts and detail-led work. Choose according to the largest real layout, smallest required feature, lift preference and rotary geometry.
How much larger is a 150×150mm field than 110×110mm?
The nominal areas are 22,500mm² and 12,100mm². Therefore, the 150mm square field is about 86% larger by area. That does not automatically mean 86% more production.
What are the G2 focal lengths for the two lenses?
Gweike's current focusing guide lists 211mm for the 110-field lens and 261mm for the 150-field lens, measured from the bottom of the field lens to the material's top surface.
Does the 110×110mm lens have a smaller laser spot?
A smaller field and shorter focal length generally favor compact-detail applications, but the checked G2 pages do not publish separate verified spot diameters for these lenses. Ask for a sample when a specific line width, text size or code readability is required.
Which G2 lens is better for jewelry engraving?
The 110×110mm field is the logical starting point for rings, small pendants, coins and other compact pieces that fit inside the field. Test valuable materials and the smallest design detail before production.
Which lens is better for engraving tumblers?
Do not decide from flat field size alone. Choose only after checking the tumbler diameter and shape, rotary type, axial design width, focal distance, stand clearance and the current rotary compatibility listing.
Can the 150×150mm lens engrave more pieces at once?
It provides more layout area and may hold more small pieces in a suitable fixture. Actual throughput depends on part shape, spacing, loading time, scan strategy and settings, so test the full production cycle.
Does the 150×150mm lens make the G2 faster?
Not by itself. It expands the usable field. Marking time still depends on artwork, scanned distance, fill spacing, speed, power, frequency, number of passes and material response.
Do the two lenses use the same focus distance?
No. Current Gweike guidance lists 211mm for the 110-field lens and 261mm for the 150-field lens. Refocus after changing the lens or changing material height.
Can I use the same engraving settings after switching lenses?
Treat previous settings only as a starting point. Verify software field size, focus, alignment and material response, then run a test matrix on representative scrap before customer work.
Which lens comes with the G2 20W and G2 Pro 30W?
Current listings offer a 110×110mm manual-lift configuration and a 150×150mm electric-lift configuration. Check the selected variant in the cart before ordering.
Which field lens is listed for the G2 Max 50W?
The current G2 Max 50W product listing checked for this guide presents the 150×150mm field with electric lift. Product configurations may change, so verify the live listing.
Can I change from 110×110mm to 150×150mm later?
A G2 field lens is sold separately, but compatibility and setup must be confirmed. The software work area, focal distance, alignment, safety clearance and any rotary configuration must match the installed lens.
How should I make the final choice?
Measure your largest layout, list your smallest critical detail, decide whether the current manual or electric lift suits your workflow, and verify rotary geometry if needed. For high-value or precision work, request a sample using the exact file and material.
