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<blockquote data-quote="WayneF" data-source="post: 442095" data-attributes="member: 12496">It will have to be zoomed out to wide angle to be able to focus very close.A ruler works to check how close to 1:1, either horizontal or vertical,&nbsp; however you also have to know the sensor size.&nbsp; Sometimes that is known, sometimes it is not.Specs at <a href="http://www.fujifilm.com/products/digital_cameras/s/finepix_hs25exr/specifications/" target="_blank">FinePix HS25EXR / HS28EXR | Specifications | Fujifilm Global</a>says it is a 1/2 inch sensor.&nbsp; That is an extremely vague way to not say anything specific.Wikipedia <a href="https://en.wikipedia.org/wiki/Image_sensor_format#Table_of_sensor_formats_and_sizes" target="_blank">https://en.wikipedia.org/wiki/Image_sensor_format#Table_of_sensor_formats_and_sizes</a>says a Fuji HS30 1/2&quot; sensor is 6.4 x 4.8 mm ... which possibly could be close?If it were 6.4mm wide, then the crop factor (compared to 35mm film) would be 5.6.Probably reasonable, because...Fuji lens specs say 4.2 to 126 mm,&nbsp; Equivalent to 35mm film 24-720 mm.That computes crop factor to be 24/4.2 = 5.71, which is fairly close to the 5.6 crop number computed from approximate sensor size.</blockquote>

[QUOTE="WayneF, post: 442095, member: 12496"] It will have to be zoomed out to wide angle to be able to focus very close. A ruler works to check how close to 1:1, either horizontal or vertical, however you also have to know the sensor size. Sometimes that is known, sometimes it is not. Specs at [URL="http://www.fujifilm.com/products/digital_cameras/s/finepix_hs25exr/specifications/"]FinePix HS25EXR / HS28EXR | Specifications | Fujifilm Global[/URL] says it is a 1/2 inch sensor. That is an extremely vague way to not say anything specific. Wikipedia [URL]https://en.wikipedia.org/wiki/Image_sensor_format#Table_of_sensor_formats_and_sizes[/URL] says a Fuji HS30 1/2" sensor is 6.4 x 4.8 mm ... which possibly could be close? If it were 6.4mm wide, then the crop factor (compared to 35mm film) would be 5.6. Probably reasonable, because... Fuji lens specs say 4.2 to 126 mm, Equivalent to 35mm film 24-720 mm. That computes crop factor to be 24/4.2 = 5.71, which is fairly close to the 5.6 crop number computed from approximate sensor size. [/QUOTE]

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