Jun 22 2019

Portra 160

Back in 2011 Kodak updated Portra 160 using the technologies from their motion picture Vision films.  While Portra 160 does have a finer grain structure than Portra 400 they have it rated for sharpness even a tiny amount bellow Portra800. Its grain though falls between Portra 400 and Ektar 100 which is claimed to be the finest grained colour negative film ever.

Portra160_scale1

Given all this it should perform similar to Portra 400 but with a slightly lower sensitivity and perhaps every so slightly softer which may be why Kodak present it as a film ideal for portraiture.

You can see that 160 and 400 have similarly shaped spectral curves that differ from Ektar 100. The images from Portra 160 & 400 emulsions properly exposed should therefore give similar results which is what I have found.

Kodak_L1

This is one of the reasons I gravitate towards Portra 400 rather than 160 I rarely find myself in a situation where there is just too much light to shoot 400.  And given the abilities of these films to handle over exposure of several stops it just isn’t a problem shooting 400 speed film.  Also with a hybrid film to digital workflow there is always the ability to make some adjustments.  So while I do use Portra 160 from time to time as seen in the images below I prefer Portra 400 for its versatility.

You can find more info around Kodak Alaris films here

Kodak Alaris


Jun 8 2019

Canon QL17 III

CanonQL17-8445

In 1971 Canon was advertising the Canon QL17 as a carry-it-anyplace camera that gave quick and precise rangefinder focusing and that it was the most automatic precision camera you can buy but that it could be used 100% manually if you prefer.

QL17AD1971

My camera is actually the QL17 G-III but there is little difference between them.

It may have been superseded as the most automatic precision camera you can buy in the last 48 years but it is still an easy to carry precision rangefinder.  The lens of the QL17 is a 45mm f1.7 constructed with 6 elements in 5 groups. and is a fantastic performer.  The image bellow shows details from the corners and center without any editing.  You can see there is just a tiny amount of chromatic aberration but the entire field is sharp.  This image was taken with the lens stopped down but it is good even wide open.

CanonQL17_Portra400_2018_034-Edit copy

The shutter a Copal SV has a top speed of 1/500 second and can be used without a battery which is fortunate because the camera was originally designed to use a 1.3V mercury cell.

So there is good reason that this camera is still well regarded its just a great little fixed lens rangefinder.


Jun 1 2019

Olympus Stylus 150

Stylus150-4317

Released in 2003 six years after the much better and more desirable Olympus Stylus Epic the Stylus 150 marked the end of new film cameras from almost all camera makers as they focused their efforts exclusively on digital cameras ( I believe the Stylus Epic Zoom 170 was released before the 150) .  And that’s okay because cameras like this had reached their limit and maybe even pushed a little too far.  What I mean is at an aperture of f13.3 and a focal length of 150mm it reaches beyond where it should.  Without a lot of light the camera is going to be forced to use slower shutter speeds than should be used.  There is a mode that is intended to counteract this it is the camera shake mode under the flash menu.  Olympus isn’t very clear about how this functions.  In the manual it says that if the green and orange LED’s around the viewfinder are alternately blinking then there is a potentially for too much camera shake and to hold the camera securely until the blinking stops.  This suggests that there is a sensor in the camera that is measuring the shake.  In a brochure for the camera they say it a little differently.

Camera Shake Indicator: This innovative feature prompts you to steady the camera when shake is detected. Even if movement continues, it automatically selects a faster shutter speed to reduce image blur.

How effective this is isn’t clear but that fact that they were making this effort is another indication of the problem that these long zoom compact cameras were suffering from.

The specifications for the lens on the Stylus 150 is  37.5 ~ 150 mm, F5.1 ~ 13.3, 8 elements in 7 groups.

Stylus150

A previous post about the Olympus Stylus 150 can be seen here Stylus 15o