www.photomacrography.net :: View topic - Newbie questions before inital purchase. Lumix GH2 + WeMacro
www.photomacrography.net Forum Index
An online community dedicated to the practices of photomacrography, close-up and macro photography, and photomicrography.
Photomacrography Front Page Amateurmicrography Front Page
Old Forums/Galleries
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Newbie questions before inital purchase. Lumix GH2 + WeMacro

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Beginners Micro
View previous topic :: View next topic  
Author Message
curreta



Joined: 26 Oct 2019
Posts: 2

PostPosted: Sun Oct 27, 2019 7:50 am    Post subject: Newbie questions before inital purchase. Lumix GH2 + WeMacro Reply with quote

Hello! This is my intro post and I first want to thank all the contributors here. You really do shine as a community.

I've read as many posts here as I can before going cross-eyed. The numbers, light science, and lingo can be overwhelming at times. My apologies if I could have figured this out on my own, but the sheer amount of information has me questioning life in general. :-)

I have a few questions that I'd love some assistance on before pulling the trigger on a purchase.

My Goals:

    -- Explore the micro world around my neighborhood
    -- Share interesting finds with my friends and family
    -- Better my knowledge about lighting/magnification/lenses/etc.


Gear I am considering:

    -- Panasonic Lumix GH2 m4/3 Body (currently own)
    -- WeMacro Rail
    -- WeMacro Raynox DCR 150 tube lens Pro - with m4/3 mount & Raynox 150
    -- WeMacro 4X and 10X Infinity Plan Objective Lenses
    -- Diffusion using cups / vellum paper / light boxes


Questions:

    -- Am I missing a crucial piece to have a solid entry level setup? I am under the assumption that (all?) 10x objectives require a 150mm tube, and a 4x needs...less tube? (WeMacro seems like my kind of gear)
    -- Will the m4/3 adapter mount on the tube lens fit my GH2? Or, do I need a Lumix specific adapter?
    -- What lighting would your recommended for this type of exploratory setup?
    -- Assuming I improve everything within my control, what quality can I expect from this gear? I've looked for sample images, but my GH2 body plus the non-Nikon non-Mitutoyo objective have me wondering.
    -- I currently think that a smaller sensor size will result in a cropped image from the high resolution provided by the objective. If later I upgraded to a full frame sensor, the quality (sharpness/coloration/etc) and zoom factor would remain the same, but the image dimensions would be greater showing more of the subject? Is this correct thinking?


Thank you for your time, and I look forward to sharing some images in the coming weeks/months.


-Carlos
_________________
- Carlos

Panasonic Lumix GH2 | Still researching micro gear
Back to top
View user's profile Send private message
Chris S.
Site Admin


Joined: 05 Apr 2009
Posts: 3324
Location: Ohio, USA

PostPosted: Mon Oct 28, 2019 3:27 am    Post subject: Reply with quote

Carlos, welcome to the forum!Very Happy

I won’t attempt to answer all your questions tonight, but will give it a start. Likely, other members will fill in more of the blanks.

In general, it seems as if you have a useful outfit planned. While I have no experience with WeMacro products, I’ve heard nothing but positive feedback by users. As to specifically comparing the quality of WeMacro lenses to Nikon or Mitutoyo, I don’t recall if anyone has done that. If not, it’s a good question.

You ask if you’re missing a crucial piece. Trust me in saying that no matter how well you plan, you’ll keep finding things you need or want for some while as you pursue this path. Some of us never stop. You will, for example, want something to hold your subjects.

One thing I’d consider crucial is some sort of mounting platform for your WeMacro rail and subject holder. This can be a piece of wood, metal, rock or concrete, perhaps also rigid plastic. The idea of this platform is to mechanically couple your camera and subject. This helps a lot in reducing vibration (often a difficult thing to deal with at first) by making the camera and subject move together.

You asked what lighting to use. For beginners at 4x and 10x magnifications, the best answer is flash. Flash, when used on its lowest-duration settings, is like a magic wand for freezing out vibration. (To repeat, vibration is usually the first big obstacle beginners face.) Later on, you may prefer continuous light, which has some advantages over flash—but that’s not a question to entertain at the beginning.

Quote:
I am under the assumption that (all?) 10x objectives require a 150mm tube, and a 4x needs...less tube?

There seem to be a few misconceptions here. So let me try to fix them. Finite lenses need to be mounted on empty tubes; these tubes are designed for a particular tube length as specified on the lens.

But you are looking at infinite lenses, which require a converging lens (sometimes called a tube lens) to be used with them. That converging lens needs to be placed at infinity focus distance from the camera’s sensor plane. That distance will be created by a tube, camera adapter, and the depth of your camera from lens mount to sensor.

Since you’re buying the Raynox DCR 150 (a lens originally intended for a different purpose, used here as a converging lens) in a WeMacro Pro setup, I’d suggest asking WeMacro the best way to hook this setup to your camera body. (WeMacro is said to be very good about customer service.) The issue isn’t just mechanical connection, but also getting the total length right to achieve infinity focus on your sensor.

Once you have a converging lens mounted at infinity focus in front of your sensor, you can mount either your 4x and 10x lenses on it, presuming they were designed for the same focal length of converging lens. (Objectives designed to work as a set are designed for the same converging lens; most objectives made by a given manufacturer are designed for the same converging lens; objectives designed as Mitutoyo "work-alikes" are designed for the same converging lens; and there is quite a bit of wiggle room--most infinite objectives work fine with converging lenses in wide range of focal lengths.) So you should be able to use a single setup for both your 4x and 10x objectives.

Regarding sensor sizes, you’re right. Your small m4/3 sensor crops the center out of the objective’s image circle, effectively reducing the camera’s field of view. (Don’t let this stop you—some of our members make wonderful images with m4/3.) If you ever move up a size to APS-C, you’ve be cropping less--enjoying a wider field of view—and matching closely the high-quality image circle of many objectives. If you jump another size higher, to DSLR full frame, you’ll get still more field of view, but will be recording the slightly less acute edges of the objective’s image circle. For most objectives in most uses, this slight loss at the corners doesn’t matter, but the additional field of view may be helpful. There good arguments in favor of each of these sensor sizes for the photography of small things.

Good luck as you move into high-magnification macro photography!

I’m sure other members will fill in around my advice.

Cheers,

--Chris S.
Back to top
View user's profile Send private message Send e-mail
curreta



Joined: 26 Oct 2019
Posts: 2

PostPosted: Thu Oct 31, 2019 11:34 am    Post subject: Reply with quote

Quote:
I won’t attempt to answer all your questions tonight.

...proceeds to answer all the questions like a boss.

Thank you for your insight on all of this. I wasn't thinking about vibration but that makes sense. Vibrate all, or vibrate none.

Along with the original parts listed above I ordered the WeMacro Vertical/Horizontal 2.0 and specimen holder. That should couple the whole unit for vibration sync. I'm also looking to build a heavy (maybe marble) table to make it even sturdier.

I read a bit more regarding how the infinity objectives work in tandem with the tubes and that started to click.

William from WeMacro is really stellar. I highly recommended that company for anyone considering.

Thanks again for the help. I'd like to write up my findings here as I learn them. Hopefully coming at it as a newbie will help others.

Warm regards,

-Carlos
_________________
- Carlos

Panasonic Lumix GH2 | Still researching micro gear
Back to top
View user's profile Send private message
Chris S.
Site Admin


Joined: 05 Apr 2009
Posts: 3324
Location: Ohio, USA

PostPosted: Sun Nov 03, 2019 2:05 am    Post subject: Reply with quote

Carlos,

You're very welcome! Glad you found some of it useful. Feel free to continue asking questions as they come up--most of us have walked this path before, and struggled with the same questions you're likely to struggle with.

Will look forward to your posts of findings as you move along this path yourself--as you say, they will likely help others.

Here at PMN, we're moving forward as a group much more rapidly than we ever could as individuals.

Cheers,

--Chris S.
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Beginners Micro All times are GMT - 7 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group