Currantos

Joined on Dec 18, 2018

Currantos' recent activity

  • I raised this question/discussion about 2 weeks ago. Oh, my. Prepare for some grief as the vultures of DPR descend on you. If you read 10 of the responses in a row you'll be made to think you are ...
  • Exactly, if they can put it on a 70mm zoom then why not put on a 85mm/105mm/135mm/etc prime? Thanks
  • yes, I read the wikipedia article, and some others, so totally agree about the actual Fresnels, versus the catch name moniker they are using. LOL It's French too, so these lenses have style
  • I am just learning about it, so no, I don't have any predetermined beliefs. But from the performance reviews of the Nikon 300 and 500 PF lenses one gets 1. savings in size 2. price is good, not ...
  • Canon 400mm f/4 DO IS II | Canon 70-300 f/4.5-5.6 DO IS Nikon 300 f4 PF, Nikon 500 PF ??? They might be playing loose with terminology here but what I meant is those types of lenses that have those ...
  • Created discussion thread More Fresnel Lenses?
    Hi, There are a few longer length Fresnel element lenses, like 300 f4 PF. Where are they not making more of them, seems there is savings in size/weight? In more regular focal lengths like 50mm and ...
  • Can someone explain what is the value of having a SMALL sensor inside a LARGE mount. That is not a convincing way to have a smaller overall system it seems. There are already small systems with...

  • Hi, I am getting most of my information from DxOmark but occasionally other sites report T values and seems to line up more or less. I understand that T values lag F values due to light loss, shake ...
  • Thank you for your examples. The last one is really technically great, would love to know more about how it was accomplished. I have tried for similar and have run into the following problems. The ...
  • Thank you, great examples of "good shadows" and "not so good, LOL. The ones telling a story are great.
  • Thank you, great reading. One thing it does not address is related to the actual shadow and that comes from differences between moving images and stills. In stills the shadow is a 'subject' and is ...
  • Working on it, I will try to explain/demonstrate better what I mean. Takes mental work to get it correct and hard to figure out
  • Created discussion thread Subject/Background shadow modifier?
    Hi, Is there such thing as "nice" shadows on the white wall behind the subject, versus "ugly"/distracting? Any advice as far as modifiers/fill, etc? I am in the experimental stage right now, no ...
  • Created discussion thread Thread/Post rating
    Hello. How about having a small feature where at the end of the post there is a little rating box and you rate from 1-10 the utility of the post. Many times the posts on here start out semi ok but ...
  • I spoke to someone related to them and it was definitely not a "glitch". It was done on purpose. Very few items were sold at those prices, a mere microdrop in the bucket as far as Amazon is ...
  • Replied in Oops
    Agreed, of course, makes sense.
  • Replied in Oops
    This is a fantastic demonstration. I actually think, and maybe I am 'original' that 36mm square with corners cut off by hard vignette from the lens circle would be absolutely best. It would be so ...
  • Replied in Oops
    Please correct me if I am wrong. To fit inside a 43mm circle the sides of the square would be 30.4mm, not 26mm. I do not understand where 26 comes from. As for the area covered with pixels 30x30 ...
  • True that, but in another article explaining the manufacturing process seems to imply that is exceptionally difficult, so not realistic. The leap from rectangle to square seems more ...
  • Lenses are likely to remain circular for a very long time. I imagine nobody is going to attempt to produce a non-circular lens for wide/commercial use for tens of decades, maybe over a hundred ...
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