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Soft Effects Attachment for the Cooke S4/i 65mm and 75mm Prime Lenses
The effect of the Cooke Soft Effects Attachment is high resolution with a stunning glow to the highlights. This is not like the effect obtained with traditional filters. The image is not fuzzy, soft or screened. The effect is subtle, but most pronounced wide open, becoming less pronounced as you stop down.
The design for this lens attachment is based on Cooke’s PS945 portrait lens for 4x5 large format photography. See the effect in sample photos taken with the PS945 lens at www.cookeoptics.com.
- With the 65mm S4/i Prime: effect from T2.0 to T4.0
- With the 75mm S4/i Prime: effect from T2 to T5.6
The lens attachment fits the 65mm S4/i, and the 75mm S4/i using an adapter ring. 75mm Adapter Ring is included.
| T Stop Range | T2.8 - T22 |
| Angular Rotation of Iris Scale | 92 degrees |
| Minimum Marked Object Distance | 27 inches / 700mm |
| Close Focus from Lens Front | 19.2 inches / 503mm |
| Angular Rotation to MOD End Stop | 300 degrees |
| Maximum Diagonal Angle of View for Super 35mm Format | 26 degrees |
| Length of Lens (Lens Mount to Front) | 5.7 inches /145mm |
| Front Diameter | 110mm |
| Total Weight | 4.6 lbs. / 2.1 kg |
| Maximum Format Cover | 30mm diameter (Super 35 format) |
| Focus Scales | Two opposing focus scales - metric or footage. Scales marked from infinity to MOD |
| Focus Drive Fear | 140 teeth 0.8 metric module x 6.0 wide x 98mm from image plane |
| Iris Scales | Two opposing linear T-scales whole and third stops marked |
| Iris Drive Gear | 114 teeth 0.8 metric module x 4.0 wide 84mm from image plane |
| Internal Front Fitting Filter | Internal thread for filter adapter M105 x 0.75 pitch |