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| Cleaning inside a no LPF body - Page 1 | |
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| Posted: Wed Dec 25th, 2013 12:37 |
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1st Post |
Eric
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Perhaps a silly question .... I assume the LPF when removed from some bodies is replaced with a plain glass filter ...to protect the sensor? I wondered if these models attracted dust bunnies more or less than models with the LPF still fitted? Do these models still have the 'shaker' inside, to clean the 'sensor'?
____________________ Eric |
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| Posted: Wed Dec 25th, 2013 13:17 |
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2nd Post |
Robert
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If the sensor is constructed the same as earlier types it is encapsulated and sealed with a glass pane in front of the actual sensor surface. The LPF is a component of the UV/IR filter i.e. visible light pass filter, so I expect that would have to remain. Also the (LPF/)visible light pass filter is a part of the light path for 'digitally corrected' lenses, as such it would have to remain. So I think the answer to your question is that as far as the user is concerned there is no change with regard to 'sensor' cleaning. I 'enclosed' the word sensor because you don't actually clean the sensor, you clean the LPF/vis pass filter in front of the sensor.
____________________ Robert. |
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| Posted: Wed Dec 25th, 2013 13:40 |
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3rd Post |
Eric
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Robert wrote:If the sensor is constructed the same as earlier types it is encapsulated and sealed with a glass pane in front of the actual sensor surface. 'so did I'  So they have merely removed the antialias effect of the UV/IR filter? I didn't notice any info on shaker systems in the D7100 camera spec and wondered if it had been removed it (which on reflection I suppose would be a retrograde step). I guess the modified filter is likely to have the same 'bunny attraction coefficient'.
____________________ Eric |
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| Posted: Wed Dec 25th, 2013 16:10 |
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4th Post |
Robert
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Eric wrote:
 That is my take Eric, you can't just remove the LPF/Vis pass filter because unless you are using a zero shift lens like the Nikkor 105 UV then the image will be contaminated with UV and IR information that will be out of focus and of course it will contaminate the colour contrast of the image for a start. Not causing the LPF to slightly blur the image which I think they do by briefly dipping in acid to create a ripple of micro lenses on one side should make it cheaper to produce, having taken at least one step out of the process of creating the filter. Does this mean a D800E is on the horizon?
____________________ Robert. |
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| Posted: Wed Dec 25th, 2013 16:26 |
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5th Post |
jk
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He has a Fuji XE1 which has a 'sensor' shaker for cleaning and no LPF. But he may be considering a D800E instead of his D3. As Robert says the LPF does a number of things but I guess that the IR and UV filtering is now being performed by another filter in the stack. All they have done is remove the anti-more effect by removing the interference filter component that reduced the image sharpness. There is also the Bayer filter that sits directly above the sensor. See here for the current design. http://dpbestflow.org/camera/sensor This diagram shows it very well. Attachment: image.jpg (Downloaded 34 times)
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Wed Dec 25th, 2013 17:35 |
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6th Post |
Eric
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jk wrote:He has a Fuji XE1 which has a 'sensor' shaker for cleaning and no LPF. Thanks guys...having a senior moment....of course the Fuji has a shaker. Duh....too much Christmas fayre. Nope ....not planning a D800.
____________________ Eric |
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| Posted: Thu Dec 26th, 2013 03:58 |
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7th Post |
Robert
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jk wrote:
Well it sort of does but it's grossly over simplified and way out of scale, missing out the vital lightpath details which are crucial to understanding what is going on. There is a much better diagram on a Leica site somewhere which shows the lightpath clearly and understandably. I may have it bookmarked in my collection of links, I will try to find it.
____________________ Robert. |
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| Posted: Thu Dec 26th, 2013 04:09 |
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8th Post |
Robert
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OK, not quite what I was looking for but perhaps better, coming directly from Nikon and being exactly on topic (for once)!  http://www.nikonusa.com/en_INC/IMG/Images/Learn-Explore/Camera-Technology/D-SLR/2012/Moire-D800-D800E/Media/OLPF_schematic.pdf Another interesting and related link from a respected source: http://www.lifepixel.com/blog/anti-aliasing-low-pass-filter-removal
____________________ Robert. |
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| Posted: Thu Dec 26th, 2013 04:33 |
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9th Post |
Eric
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Robert wrote:OK, not quite what I was looking for but perhaps better, coming directly from Nikon and being exactly on topic (for once)! Interesting different functions between the two LPFs in each system. Not just as simple as removing a coating.
____________________ Eric |
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| Posted: Thu Dec 26th, 2013 05:14 |
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10th Post |
Robert
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Yes, that is interesting, obviously more to this just leaving out a bit of glass, it's a different system. Eric, have you noticed your D200 being sharper than expected? That doesn't have an anti-aliasing filter either. Generally the D200 isn't known for it's razor sharpness, the D200 anti-aliasing filter is said to be rather stronger than ideal.
____________________ Robert. |
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| This is topic ID = 814 Current time is 13:59 | Page: 1 2 | |
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