Timeline for Why does my Canon 50mm f/1.8 have an interference pattern on the viewfinder?
Current License: CC BY-SA 4.0
12 events
| when toggle format | what | by | license | comment | |
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| Jun 16, 2020 at 11:21 | history | edited | CommunityBot |
Commonmark migration
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| Jan 21, 2020 at 21:47 | comment | added | Brandon Dube | Fiberglass and glass have very different properties. Fresnel lenses are almost entirely made by precision molding. | |
| Jan 15, 2020 at 17:51 | comment | added | Nate S. | @BrandonDube, it may be something of a hybrid etching, similar to what's done for some steps of IC manufacture: a photosensitive mask is applied, the laser + some chemical wash removes part of the mask, and then chemical etching is done on the parts where the mask was removed. | |
| S Jan 14, 2020 at 23:41 | history | suggested | Glorfindel | CC BY-SA 4.0 |
broken image fixed (click 'rendered output' or 'side-by-side' to see the difference – image not uploaded to Imgur because the author didn't license them in a CC-BY-SA compatible manner); for more info, see https://gist.github.com/Glorfindel83/9d954d34385d2ac2597bbe864466259f
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| Jan 13, 2020 at 8:49 | review | Suggested edits | |||
| S Jan 14, 2020 at 23:41 | |||||
| Mar 7, 2016 at 0:16 | comment | added | Brandon Dube | The glass most likely isn't laser-etched, as laser polishing is an extremely new technology being researched at the Fraunhofer instutite in Germany. Rapid local heating a la a laser tends to cause glass to explode. | |
| Oct 23, 2013 at 16:23 | comment | added | Digital Lightcraft | its probably because of the DETAIL that is in-focus makes it less apparent. | |
| Oct 23, 2013 at 16:22 | comment | added | mel | Thanks. I thought it was something like this. I just don't get why it becomes so much more apparent when the lens is out of focus. | |
| Oct 23, 2013 at 16:20 | vote | accept | mel | ||
| Oct 23, 2013 at 16:15 | comment | added | Digital Lightcraft | I'll add that the reason Mel is seeing it with this lens is that being a 1.8 its letting in a LOT more light than a kit lens, making the viewfinder much brighter and making the effect much more pronounced and noticeable. (I have seen a similar effect with the 50mm 1.4 on my D800) | |
| Oct 23, 2013 at 15:01 | history | edited | Matt Grum | CC BY-SA 3.0 |
added 159 characters in body
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| Oct 23, 2013 at 14:43 | history | answered | Matt Grum | CC BY-SA 3.0 |