Quick Look: Assessing the Live View mode of the Fujifilm S5 Pro (or S3 Pro) feature for photomicroscopy.

 by David Walker, UK

 

The ability to focus a live image with a DSLR using the so-called Live View facility has become an increasingly popular feature in current models and can also be valuable for photomicroscopy. All the major camera makers now have models in various price ranges with this feature. For potential DSLR buyers looking for a Nikon mount Live View DSLR camera, a model in the 'entry level' range doesn't currently exist but is offered in the mid-range Nikon D90 and D300.

When purchasing a DSLR it can be more cost effective to consider a slightly earlier model as the depreciation can be considerable. The Nikon mount Fujifilm S5 Pro based on the highly regarded D200 body is a prosumer camera with an initial price tag in four figures when released in January 2007 but can now be bought for less than half its original price and less used, putting it in a price bracket not far off Nikon's current 'entry level' DSLRs with much less advanced specs. The earlier model the S3 Pro, also a well regarded camera, is good value if sought used e.g. on eBay.

One feature in the S3 Pro / S5 Pro that wasn't widely regarded as very practical for normal photography (judging from online camera forums) is its 30 second live view feature, which can be displayed either on the camera's LCD or externally on TV or PC. This feature may be more useful for photomicroscopy and the author was interested in comparing it to the up to 1 hour Live View on a Nikon D300 which the author was very familiar with. Some experiences with this feature are presented below using an S5 Pro camera borrowed from a colleague.

The many other features of this camera aren't addressed, but worth noting that Fuji's 'Super CCD' sensor' in the S3 Pro / S5 Pro was stated by the makers to have an 'expanded dynamic range'. A 9 EV dynamic range is typical of a modern DSLR, e.g. see DPreview's Nikon D300 tests, but the same site testing the S5 Pro remarked that 'almost 12 EV' was possible from a jpeg image with 'careful exposure'. Apparently the Fuji sensor DSLRs have proved particularly popular for subjects with demanding shadow / highlight retention such as in wedding photography; some photomicroscopy imagery can also have a tricky dynamic range so may be a valuable feature.

Live View use on camera

 

The Live View mode is quickly implemented using the feature buttons 'A' and 'B' on the camera back shown above for the S5 Pro.

Live View on TV

To capture the above LCD screen shots, the composite video out was fed to a TV to photograph which also provided an opportunity to asses the practicality of live view on a TV. The image quality looked good enough and a small TV eg LCD next to the microscope / camera could be a potential way of using the feature. 

Live View on computer plus remote camera control

The Live View can be displayed on a computer and camera controlled remotely using the Fujifilm Hyper Utility V3 software. Unfortunately this isn't supplied with the camera and can be typically 70 new, but original CDs are available for half this price from suppliers.

Palate of whelk, Victorian mount by Wheeler. Zeiss 2.5x planachro objective, crossed polarisers and lambda plate.

Comments

As remarked, this was a 'quick look' on a borrowed camera, but the live view looks potentially useful for photomicroscopy if considering this model for general photography. The viewfinder can be used for general composition and initial focus, with the 30 sec live view providing critical focus. The feature can also be useful for initially setting up the camera to be critically parfocal with the microscope.

To check both the viewfinder image and live view image with ease, the camera's LCD back may be most convenient for live view or a TV / computer adjacent to the microscope for remote imaging. The camera's LCD was too high on the author's Zeiss research stand for comfortable use but putting a right angle prism or mirror on the LCD can circumvent this as the author did for the D300.

Live subjects may have to be efficiently immobilised as the short duration of the live view feature may make it awkward to track a subject. The S3 Pro / S5 Pro models don't have a dust removal feature on the sensor unlike most modern models with live view so uncertain if dust build up may be a problem.

If extended live view is an important feature and a Nikon mount wasn't crucial, the more recent DSLR models would probably be better, eg those by Pentax, Olympus or Canon in this price range.

Comments to the author David Walker are welcomed.

Acknowledgement: Thank you to a colleague for the kind loan of the camera.

 

 

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