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Photography Q&A
200mm f/4 lens focusing distance and blurry image at 1:1 magnification ratio
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<blockquote data-quote="Aligem" data-source="post: 836737" data-attributes="member: 63913"><p>Hello Everyone</p><p>I am new in Marco photography and I am trying to capture images of small Gemstone. I use d90 and 200mm macro lens. first of all I need to say that I use daylight in this set up so if it is wrong please let me know if I change the light and use artificial lighting, do I get the image crystal clear? I shoot at min focusing distance to keep at least 1:1 ratio of the subject on the sensor. The image and entire scene is blurry, so the problem is focusing at this minimum distance do not provide clear image of the scene and the image on the Histogram looks good and the picture is bright but not crystal clear. It is rather blurry and fuzzy than clear image. </p><p>I also need to ask you is this normal for this lens not to be able to get at least clear image at focusing distance ? or is there something wrong with my set up?</p><p>When I take a longer distance shot the image is clear and all sharp and good, so there is no problem with the lens or camera.</p><p>What if I add Microscope objective on the front of the lens? does this make the 5mm Gem large enough to be visible (((the surface of the Gem clearly and if I add strong lighting does this solve the issue )))of the blurriness of the scene? I have seen people using much smaller lens in focal length but they get sharp image and facet junctions on the Gem are more clear to visualize? can you shed some light on this to understand where the problem coming from? Your pro advice is appreciated.</p></blockquote><p></p>
[QUOTE="Aligem, post: 836737, member: 63913"] Hello Everyone I am new in Marco photography and I am trying to capture images of small Gemstone. I use d90 and 200mm macro lens. first of all I need to say that I use daylight in this set up so if it is wrong please let me know if I change the light and use artificial lighting, do I get the image crystal clear? I shoot at min focusing distance to keep at least 1:1 ratio of the subject on the sensor. The image and entire scene is blurry, so the problem is focusing at this minimum distance do not provide clear image of the scene and the image on the Histogram looks good and the picture is bright but not crystal clear. It is rather blurry and fuzzy than clear image. I also need to ask you is this normal for this lens not to be able to get at least clear image at focusing distance ? or is there something wrong with my set up? When I take a longer distance shot the image is clear and all sharp and good, so there is no problem with the lens or camera. What if I add Microscope objective on the front of the lens? does this make the 5mm Gem large enough to be visible (((the surface of the Gem clearly and if I add strong lighting does this solve the issue )))of the blurriness of the scene? I have seen people using much smaller lens in focal length but they get sharp image and facet junctions on the Gem are more clear to visualize? can you shed some light on this to understand where the problem coming from? Your pro advice is appreciated. [/QUOTE]
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Photography Q&A
200mm f/4 lens focusing distance and blurry image at 1:1 magnification ratio
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