• JohnSheehyRevpanorama_fish_eye
    549 posts
    2 years ago

    There could only be more DOF possible with smaller sensors if the lenses used with the smaller sensors had smaller minimum entrance pupils.

    To a person who thinks in terms of f-ratio, then certainly the same f-ratio (when AOV is the same) will give more DOF with the smaller sensor, but that is not a logical way to approach needed DOF; it should be based on the entrance pupil size; not the f-ratio. That will be lens-dependent.

  • bobn2panorama_fish_eye
    2 years ago

    By and large they do, because the maximum f-number in macro lenses doesn't generally account for format size.

  • NCVpanorama_fish_eye
    1984 posts
    2 years ago

    Some great pictures Don!

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    there is always a disadvantage to smaller sensors apart from usabillity.
    w351.jpg

    w63.jpg

    w351.jpg

    JPG, 1.7 MB, uploaded by DonaldB 2 years ago.

    w63.jpg

    JPG, 1.0 MB, uploaded by DonaldB 2 years ago.

  • JohnSheehyRevpanorama_fish_eye
    549 posts
    2 years ago

    Those are not the same photo. What is the point of comparing so many arbitrary factors?

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    No they arnt one is taken with the fz150 and one taken with the em5.

  • Foskitopanorama_fish_eye
    284 posts
    2 years ago

    Stunning images, congrats on that amazing job!!

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    had a play with my a74, sensor needs cleaning ,but i ran out of wet swabs 😒
    image is impressive though.

    ant a74 4x.jpg

    ant a74 4x.jpg

    JPG, 21.3 MB, uploaded by DonaldB 2 years ago.

  • simplejoyhelp_outline
    1662 posts
    2 years ago

    That‘s a fantastic capture! Well done. 👍 Is it on a dandelion?

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    Yes, i always let them runaround on flowers and get covered in pollin . 😁

    these are in the field. once in a life time shots.

    w432 (2023_05_12 22_17_46 UTC).jpg

    w429print.jpg

    w434.jpg

    w434.jpg

    JPG, 2.6 MB, uploaded by DonaldB 2 years ago.

    w429print.jpg

    JPG, 3.2 MB, uploaded by DonaldB 2 years ago.

    w432 (2023_05_12 22_17_46 UTC).jpg

    JPG, 1.7 MB, uploaded by DonaldB 2 years ago.

  • Dannyhelp_outline
    435 posts
    2 years ago

    Excellent shots Don!

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    did some tests and i was correct my a74 larger sensor/pixels can easily out resolve my old em12 ,the pixel size plays a big part . ive been saying it for years.

    amscope.com/pages/camera-resolution

  • simplejoyhelp_outline
    1662 posts
    2 years ago

    From what I've read so far I think so as well. Pixel size/pixel pitch matters.

    Here's a short thread on it on photomacrography:
    www.photomacrography.net/forum/viewtopic.php?f=8&t=45894

    As stated before, I'm sure there are significantly more detailed explanations and examples with specific cameras/camera-lens combinations there or elsewhere, but given that I'm not very interested yet in those specifics (I might be at some point in the future, I guess), I can't name exact links.

  • simplejoyhelp_outline
    1662 posts
    2 years ago

    On a different note:

    Inspired by the beautiful recent ant shot by @DonaldB with the pollen, I decided to shoot some flower details up close as well:

    live.staticflickr.com/65535/53016634724_00bfdd912f_h.jpg
    Full Res: live.staticflickr.com/65535/53016634724_e6c2e7e56d_o.jpg

    live.staticflickr.com/65535/53016957178_03e0260be7_h.jpg
    Full Res: live.staticflickr.com/65535/53016957178_27b02990fd_o.jpg

    All of a sudden, this tiny creature (being around 1-1.5 mm in size) appeared out of the flower:
    live.staticflickr.com/65535/53016635724_9634617e9a_h.jpg
    Full Res: live.staticflickr.com/65535/53016635724_e444e52b97_o.jpg

    Of course my setup isn't made to capture such a tiny creature running around. I was lucky that it stopped a couple of times, because I wouldn't have been able to capture it at all (with my continuous lighting setup) if it wasn't for that. I've no idea what kind of creature that is... doesn't look like a typical aphid to me.

    Image quality is not quite where I'd want it to be yet, but it was fun using my 16 mm Luminar again... such a nice little lens!

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    ive been thinking of buying another olympus 4x microscope objective, i bought a 40yold 10x olympus and is great.

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    another fav shot

    w503 (2023_04_01 06_34_30 UTC) (2023_06_30 21_51_49 UTC).jpg

  • JohnSheehyRevpanorama_fish_eye
    549 posts
    2 years ago

    You can say it for centuries, but it will still be wrong. All that larger pixels are better for is smaller files and faster rolling e-shutters, due to less pixels to read out. And maybe a little less light loss at very low f-numbers, around 2 or lower, but BSI is reducing that issue.

    Your so-called "tests"; did they use the same sensor area on both sensors so that you're really comparing pixel size/density, and not sensor area? Same optics, so that you're not comparing optics? Same subject and distance? Your claim should stand when everything else but pixel density is the same.

  • DonaldBpanorama_fish_eye
    2366 posts
    2 years ago

    many of the extreme macro forums agree and so do the microscope objective manufacturers . 10 x objective should have a min pixel size of 5.0um.
    can you actually take images ? i have never seen any of your images let alone extreme macro.