Panasonic Lumix H-ES12035

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(4 aspherical lenses, 1 UED lens, 1 UHR lens)

Dust-proof and splash-proof Available

Mount “Micro Four Thirds Mount”

Angle of view 84°(Wide) to 34°(Tele)

Filter diameter 58 mm

Overall length Approx. 73.8 mm (2.9 inch)

Operating temperature

Approx. 67.6 mm (2.7 inch)

Mass Approx. 306 ｇ (0.67 lb)

(from the tip of the lens to the base side of the lens mount)

Max. diameter

Specifications

INTERCHANGEABLE LENS FOR DIGITAL CAMERA

“LEICA DG VARIO-ELMARIT 12-35 mm/F2.8 ASPH./POWER O.I.S.”

Focal length

f=12 mm to 35 mm

0.25 m (0.82 feet) to ∞ (Tele) (from the focus distance reference line)

(35 mm film camera equivalent: 24 mm to 70 mm)

Aperture type 7 diaphragm blades/circular aperture diaphragm

Maximum aperture F2.8

Nano surface coating Yes

Unauthorized copying and distribution is a violation of law.

F22

Lens construction 14 elements in 9 groups

In focus distance 0.15 m (0.49 feet) to ∞ (Wide to focal length 17mm)/

Maximum image magnification 0.21× (35 mm film camera equivalent: 0.42×) (focal length 17mm)

Optical image stabiliser Available

Minimum aperture value

[O.I.S.] switch Available (Switching ON/OFF)

-10℃ to 40℃ (14℉ to 140℉)

H-ES12035

Component Repair

Service Training Manual

Ver.1.0

Internal use only

Main Page

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This document serves as a service training manual for the LUMIX H-ES12035 interchangeable lens, providing comprehensive information for professional repair technicians. It outlines the lens's function, technical specifications, usage features, and detailed maintenance procedures, including disassembly, assembly, and adjustment.

Function Description

The LUMIX H-ES12035 is an interchangeable lens designed for digital cameras, specifically compatible with the "Micro Four Thirds Mount." It is a "LEICA DG VARIO-ELMARIT" lens, indicating its high optical quality and variable focal length. The "F2.8 ASPH." designation highlights a constant maximum aperture of F2.8 across the zoom range and the inclusion of aspherical elements for improved image quality. The "POWER O.I.S." feature signifies the presence of optical image stabilization, which helps to reduce blur caused by camera shake, particularly useful in low-light conditions or when shooting handheld. The lens is also designed to be dust-proof and splash-proof, enhancing its durability and usability in various environmental conditions.

Important Technical Specifications

Focal Length: 12 mm to 35 mm (35 mm film camera equivalent: 24 mm to 70 mm). This range covers wide-angle to short telephoto perspectives, making it a versatile lens for various types of photography, including landscapes, portraits, and everyday shooting.
Aperture Type: 7 diaphragm blades, forming a circular aperture diaphragm. A circular aperture helps to produce smooth, attractive bokeh (background blur).
Maximum Aperture: F2.8. This constant bright aperture allows for excellent low-light performance and shallow depth of field control across the entire zoom range.
Minimum Aperture Value: F22.
Lens Construction: 14 elements in 9 groups, including 4 aspherical lenses, 1 UED (Ultra Extra-low Dispersion) lens, and 1 UHR (Ultra High Refractive Index) lens. These specialized elements are crucial for correcting aberrations, ensuring high resolution, and maintaining image quality throughout the zoom range.
In Focus Distance: 0.15 m (0.49 feet) to ∞ (infinity) at wide-angle (focal length 17mm) and 0.25 m (0.82 feet) to ∞ (infinity) at telephoto (from the focus distance reference line). This indicates a relatively close minimum focusing distance, allowing for close-up shots.
Nano Surface Coating: Yes. This coating technology is applied to internal lens elements to minimize reflections and ghosting, enhancing contrast and color fidelity.
Maximum Image Magnification: 0.21 × (35 mm film camera equivalent: 0.42 ×) at focal length 17mm.
Optical Image Stabilizer (O.I.S.): Available, with an ON/OFF switch.
Mount: Micro Four Thirds Mount.
Angle of View: 84° (Wide) to 34° (Tele).
Filter Diameter: 58 mm.
Max. Diameter: Approx. 67.6 mm (2.7 inch).
Overall Length: Approx. 73.8 mm (2.9 inch) (from the tip of the lens to the base side of the lens mount).
Mass: Approx. 306 g (0.67 lb). This relatively light weight makes the lens comfortable for extended use.
Operating Temperature: -10°C to 40°C (14°F to 140°F).
Dust-proof and Splash-proof: Available.

Usage Features

The LUMIX H-ES12035 is designed for versatility and high performance in various shooting scenarios. Its constant F2.8 aperture makes it suitable for professional use, offering consistent exposure and depth of field control across the zoom range. The optical image stabilization (POWER O.I.S.) is a significant advantage for handheld shooting, especially in challenging lighting conditions, allowing for sharper images at slower shutter speeds. The dust-proof and splash-proof construction ensures reliability in outdoor environments, making it a robust choice for photographers who work in diverse weather conditions. The inclusion of aspherical, UED, and UHR lens elements contributes to superior image quality, with reduced aberrations and high resolution from edge to edge. The Nano Surface Coating further enhances image clarity by minimizing flare and ghosting.

Maintenance Features

The service manual provides detailed instructions for maintaining the LUMIX H-ES12035 lens, emphasizing the need for careful handling due to the delicate nature of optical components.

Clean Room Environment: All disassembly and assembly procedures must be performed in a clean room or clean box (at least class 10000) to prevent dust, soil, sand, and fingerprints from contaminating the lens elements.
Gloves: Use gloves to avoid leaving fingerprints on optical surfaces.
Cleaning Procedures for Outer Casing:
1. Blow off dust with a soft cleaning brush.
2. Sweep out dust from narrower spaces with the brush.
3. Wipe the outer casing with a dry, fuzz-free cloth.
Cleaning Procedures for Outside Lens Surface:
1. Gently blow off dust with a blower (do not blow strongly).
2. Wipe dirt with a Lens Cleaning Kit (VFK1900BK) if necessary, following the included instruction sheet. The instruction specifies wiping the lens surface with a cleaning sheet starting from the center towards the outside in a circular motion.
Cleaning Procedures for Inside Lens Surface:
1. Perform cleaning inside a satisfied clean level environment (less than class 10000).
2. Critical Warning for 5th Lens Unit: The inside of the 5th Lens Unit features Panasonic's Nano Surface Coating technology. Never touch the inside of the 5th Lens Unit during disassembly and assembly. This area cannot be wiped with any cleaning material; only air blow is permitted. If fingerprints or stains remain, the lens unit is no longer usable and must be replaced.
Disassembly and Assembly Instructions: The manual provides step-by-step procedures for removing and installing various components, including the zoom rubber, decoration ring, hood adapter, 1st lens unit, 5th lens unit, L mount unit, lens mount rubber, mount washer, rear frame unit, OIS SW unit, main PCB assy, mount contact unit, floating rubber, hold barrel unit, front barrel, zoom guide collar assy, 2nd lens unit, OIS unit, housing & D base unit, rotative barrel, and 4th lens & AF rack unit.
Torque Specifications: Important: When tightening screws, a torque driver (RFKZ0542) must be used with specified torque values provided for each step to ensure proper assembly and prevent damage. Thread lock glue (TB1353) is specified for certain screws during installation.
Grease Application: Specific instructions are given for applying grease (RFKZ0472, G-599J) to moving parts like the main shaft, sub shaft, motor screw part of the AF motor, main zoom barrel, and rotative barrel to ensure smooth operation.
Adjustment Procedures:
- Matrix Charts: Charts are provided to identify necessary adjustments (simple resolution inspection, electrical adjustment) based on replaced parts or cleaned portions.
- Flow Chart for Adjustment: A detailed flowchart guides technicians through the adjustment process, including checks for defective parts, internal dust, disassembly, replacement/cleaning, assembly, electrical adjustment, simple resolution inspection, and visual checking. If adjustments fail (e.g., Back Focus adjustment), washer thickness adjustment or re-assembly/re-exchange of parts may be required.
- Electrical Adjustment: Performed using a PC with adjustment software.
- Washer Thickness Adjustment: If Back Focus adjustment fails, washer thickness adjustment is recommended. There are two washers (2nd lens unit side and L-mount side). The 2nd lens unit side washer is more effective for the TELE side, while the L-mount side washer is more effective for the WIDE side. Adjusting the L-mount side washer is recommended first due to the time-consuming nature of disassembling the 2nd lens unit.
- Equipment and Chart Setting: Specifies the setup for checking charts, including LED lamp placement for even illumination (1500±150 lux), chart size (H 960mm x W 1440mm), camera and lens positioning on a tripod (960mm ~ 2,800mm from chart), and connecting a USB cable to a PC for resolution checking software.
- Master Body Setting and Position: Provides detailed camera settings (e.g., mode dial A, aperture F2.8, ISO 100-200, image stabilizer OFF, white balance AWB, AF mode 1 point, photo style Monochrome, metering mode Multi, picture size L, picture quality Fine, flash mode Off, aspect ratio 3:2, exposure compensation 0EV) and positioning guidelines for the master body (e.g., DC-GH5) to ensure accurate testing.
- PC Software: Requires Windows 10, Pentium 4/M or equivalent, 512MB RAM, 1024x768 resolution video adapter with 24- or 32-bit display, and 3.2 GB free hard disk space. License keys and software installation instructions are provided.
- Visual Checking: Involves mounting the lens on a master body, setting parameters, and checking for focus, resolution, and other optical characteristics using a LUMIX Chart.

This manual is strictly for experienced professional repair technicians, emphasizing safety and adherence to specific procedures to ensure the quality and functionality of the LUMIX H-ES12035 lens.