DZOFILM CATTA Ace Zoom Cinema Lens User Manual

: June 10, 2024
: DZOFILM

Table of Contents

DZOFILM CATTA Ace Zoom Cinema Lens
Safety Notes
Lens Parts
Lens Control
Flange Back Adjustment
Introduction
Safety Notes
Lens Parts
Lens Control
Flange Back Adjustment
- Preparation
- Flange Back Adjustment
Specification
After-sales Service
The Name and Content of Hazardous Substances
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DZOFILM CATTA Ace Zoom Cinema Lens

DZOFILM-CATTA-Ace-Zoom-Cinema-Lens-product

The CATTA ACE Zoom Lens is a cine lens used for capturing high-quality video footage. It is manufactured by DZOFILM and is designed for use with various cameras.

Safety Notes

Do not watch the sun or bright light source through the lens as it may cause visual disability.
Never use organic solvents such as paint thinner or benzene to clean the lens.
Attach the front and rear caps when the lens is not in use.
Store the lens and filter in cool, dry locations to prevent mold and rust. Do not store in direct sunlight or with naphtha or camphor moth balls.
Keep the lens dry and wipe off any water droplets on the glass surface.
Do not leave the lens near a heater or in other extremely hot locations as it could cause damage or warping.
Use a blower to remove dust and lint from the glass surfaces of the lens or filter.
To remove smudges and fingerprints, apply a small amount of lens cleaner to a soft, clean cotton cloth or lens-cleaning tissue and clean from the center outwards using a circular motion. Do not leave smears or touch the glass with your finger.

Lens Parts

The CATTA ACE Zoom Lens consists of various parts including:

Front Cap
Lens Mark
Focusing Ring
Screw Holes for Accessories
Zoom Ring
Zoom Lever Socket
Aperture Ring
Rear Cap
Support Base

Lens Control

The CATTA ACE Zoom Lens has three main controls:

Focus Control: Rotate the focus ring to increase or decrease the focus distance.
Zoom Control: Rotate the zoom ring to zoom out, increasing the area visible in the frame or zoom in on the subject so that it fills a larger area in the frame.
Aperture Control: Rotate the aperture ring to stop the aperture down, raising the T-stop and narrowing the aperture, or lower the T-stop to widen the aperture.

Flange Back Adjustment

The flange back distance of all CATTA ACE lenses is checked and adjusted by DZOFILM before shipping. However, there might be slight differences among different cameras. To achieve the best performance and match different cameras, flange back adjustment is needed.

Rotate the zoom ring to the longest focal length and rotate the focus ring until the image is clearest. Mark down the focusing distance S.
Rotate the zoom ring to the widest focal length and rotate the focus ring until the image is clearest. Mark down the focusing distance S1.
Compare the difference between S and S1. If S < S1, move the lens closer to the sensor plane. If S > S1, move the lens farther away from the sensor plane.
Repeat steps 1-3 until the difference between S and S1 is minimized.

Preparation

Ready your subject. You can use a Star Chart or other high-resolution black-and-white objects.
Attach the lens to the camera.
Select the maximum aperture (wide open).
Set the object 1.5m away from the camera sensor plane and adjust it to the center of the whole image.

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Introduction

Thank you for your purchase of this product!

CATTA ACE is DZOFILM’s high-performance full frame cinema zoom lens. It allows you to reproduce the details and color in filming. Clear images, natural transition from in-focus to defocus and minimal breathing in focusing…all these can be found in CATTA ACE Zoom. A good companion for your documentory/ TVC/ MV/ commercials/ online movie/ variety show/ Live/ independent films, etc. This manual is applicable to the whole series of CATTA ACE lenses which includes 18-35mm, 35-80mm and 70-135mm.

Safety Notes

Please do not watch the sun or bright light source through the lens, otherwise it will cause visually disabled.
Never use organic solvents such as paint thinner or benzene to clean the lens.
Attach the front and rear caps when the lens is not in use.
Store the lens and filter in cool, dry locations to prevent mold and rust. Do not store in direct sunlight or with naphtha or camphor moth balls.
Please keep the lens dry and wipe the water droplets off if there are water droplets on the glass surface.
Leaving the lens near heater or in other extremely hot locations could cause damage or warping.
Use a blower to remove dust and lint from the glass surfaces of the lens or filter. To remove smudges and fingerprints, apply a small amount of lens cleaner to a soft, clean cotton cloth or lens-cleaning tissue and clean from the center outwards using a circular motion. Do not leave smears or touch the glass with your finger.

Lens Parts

DZOFILM-CATTA-Ace-Zoom-Cinema-Lens-fig-3

Front Cap
Lens Mark
Focusing Ring
Screw Holes for Accessories*10 （M3, 3mm deep）
Zoom Ring
Zoom Lever Socket
Aperture Ring
Rear Cap
Support Base

Lens Control

Focus Control

DZOFILM-CATTA-Ace-Zoom-Cinema-Lens-fig-4

Rotate the focus ring to increase or decrease the focus distance.

Zoom Control

DZOFILM-CATTA-Ace-Zoom-Cinema-Lens-fig-5

Rotate the zoom ring to zoom out, increasing the area visible in the frame or zoom in on the subject so that it fills a larger area in the frame.

Aperture Control

DZOFILM-CATTA-Ace-Zoom-Cinema-Lens-fig-6

Rotate the aperture ring to stop aperture down, raising the T-stop and narrowing the aperture, or lower the T-stop to widen the aperture.

Flange Back Adjustment

DZOFILM will check and adjust flange back distance of all CATTA ACE lenses before shipping. But the flange back distance might have slight difference among different cameras. To achieve the best performance and match different cameras, flange back adjustment is needed.

Preparation

Step One: Ready your subject. You can use a “Star Chart”, or other high-resolution black-and-white objects;
- Note: You can download and print the chart on DZOFILM website-Download-Star Chart for Adjusting Back Flange（Click to jump to the website）
Step Two: Attach the lens to the camera;
Step Three: Select the maximum aperture (wide open);
Step Four: Set the object 1.5m away from the camera sensor plane, and adjust it to the center of the whole image.

Flange Back Adjustment

DZOFILM-CATTA-Ace-Zoom-Cinema-Lens-fig-7

Step One: Rotate the zoom ring to the longest focal length, and rotate the focus ring until the image to its clearest, mark down the focusing distance S1;
Step Two: Rotate the zoom ring to the widest focal length and rotate the focus ring until the image to its clearest, mark down the focusing distance S2;
Step Three: Compare the difference between S2 and S1. If S2<S1, then need to add shims; otherwise decrease the shims,
- Note: The shim adjustment is evaluated on the angle between S2 and S1. If the angle is bigger, then need to change more shims and vice versa.
Step Four: Repeat step 1-2 until S2=S1. Then it means the lens in under parfocal.

Set the object 1.5m away from the camera sensor plane, and adjust it to the center of the whole image.

Take CATTA ACE zoom 35-80 mm as an example

Rotate the focal length to 80mm, and focus till the image is at its sharpest, the focusing distance mark is 1.5m (S). And then rotate the zoom ring to 35mm, and re-focus to the image at its sharpest, current focusing distance mark is 1.4m (S2). S2<51. According to the sheet below, add 0.12mm shims on the lens mount and double-check. At this time, both 35mm and 80mm focus at the closest under 1.5 focus mark. That means this lens is under parfocal.

CATTA ACE Adjustment Reference

18-35mm shim adjustment reference
3 mm focusing mark S（1 m）|

18mm focusing mark S2（m）|

1.1

|

1.2

|

1.3

|

1.4

|

1.6

|

1.8

|

2

|

Shim adjustmen（t mm）|

+0.4

|

+0.27

|

+0.18

|

+0.08

|

0

|

-0.07

|

-0.19

|

-0.2

|

-0.4

35-80mm shim adjustment reference

80mm focusing mark S（1 m）|

3 mm focusing mark S2（m）|

1.2

|

1.3

|

1.4

|

1.6

|

1.7

|

1.8

|

2

|

2.2

Shim adjustmen（t mm）|

+0.3

|

+0.19

|

+0.12

|

0

|

-0.08

|

-0.13

|

-0.18

|

-0.23

|

-0.3

70-135mm shim adjustment reference

13 mm focusing mark S（1 m）|

70mm focusing mark S2（m）|

1.4

|

1.4

|

1.6

|

1.6

Shim adjustment（t mm）| +0.3| +0.13| 0| -0.1| -0.22| -0.3

Note: Shim adjustment: “+” means adding shims, and “-” decreases shims.

Specification

0. 1m/1ft8in

|

0.74m/2ft in

|

0.76m/2ft6in

Zoom Ratio| 1.9X| 2.3X| 1.9X
Mag. Ratio (Close Focus)| 18mm: 0.064

3 mm: 0.118

| 3 mm: 0.06 7

80mm: 0.146

| 70mm: 0.112

13 mm: 0.214

Φ80mm/3.1 “

Filter Size| M77

Length (Metric/Imperial)

|

From lens front plane to flange back: 179. mm/7.07（” PL）;187. mm/7.38″(EF/LPL)

Iris Blade| 16
Weight| 18 0g| 163 g| 1710g

After-sales Service

Repairs: Return the product to the point of purchase for repairs. Please note that we reserve the right to refuse service in the event of damage so severe that there is lile hope of function being restored, whether said damage is caused by physical shocks, exposure to or immersion in sand, mud, or water or the like.

Warranty service: Should the product malfunction in the course of normal use as set forth in the user’s manual and accompanying documentation, it may be returned to the point of purchase for repairs within warranty period. The owner is responsible for all shipping costs. The warranty period varies with the country or region of purchase. Stored dated receipts or other proof of purchase in a safe place, as it will be required for repairs made under warranty.

Service Outside the Warranty Period: Request for service will normally be accepted within a period of roughly 5 years following the end of production, during which time spares will be kept on hand, although owners may be offered an equivalent product during this period in the event that spares are not available. Compatibility with consumables and accessories for the original product is not guaranteed. To prevent waste, repairs or replacement may be made using refurbished parts or products, and DZOFILM may collect returned parts or products for later use. When returning a product for repair, please let us know if you need the original parts.

Privacy: DZOFILM obeys all applicable laws and regulations concerning the handling of names, addresses, phone numbers, and other personal information provided by users.

The Name and Content of Hazardous Substances

Part Name

| Hazardous Substances
---|---
Pb| Hg| Cd| Cr(VI)| PBB| PBDE
Lens Shell| ○| ○| ○| ○| ○| ○
Inner Mechanics| X| ○| ○| ○| ○| ○
Optics| ○| ○| ○| ○| ○| ○
Other Parts| ○| ○| ○| ○| ○| ○

This table is formulated in accordance of SJ/T11364.

○: Indicates that the concentration of the hazardous substance in all homogeneous materials in the parts is below the relevant threshold of the GB/T26 72 standard.

X: Indicates that the concentration of the hazardous substance of at least one of all homogeneous materials in the parts may be above the relevant threshold of the GB/T26 72 standard.

The “X” in the above table indicates that there are one or more exemptions are applied in the parts stated in RoHS (2011/6 /EU).

Shenzhen Dongzheng Optical Technology Co., Ltd.