I think I understand now: The flash is mounted atop the old Oly, and electronics of this camera controls that the flash duration is enough to produce a proper lighting of a particular model. If so, the theory says if you use this flash shot to take a correctly exposed picture with another camera of ...

I want to apologize first because maybe I did not fully understand your text, my English is not very good. When we use flash as the only source of light, the only important parameters are the diaphragm and the distance from the object to be photographed until the light source. The distance from the ...

I have mounted a diaphragm in my optics setup. When I use an enlarger lens, I close the diaphragm on the enlarger lens and then I use the first diaphragm, just like a ring to block stray light. I put my camera in AV mode and close aperture until the meter indicates that I begin to lose light. When I...

Thanks Chris! Surely it is a bad idea to use a finite objective with a tube lens. But I had to try it, now I know that possibly the lack of quality is due more to the quality of optics compared to way to mounting it. I already fought against reflections. Not only against internal reflections but aga...

I'm still amazed by the sharpness of the image of Javier here: http://www.photomacrography.net/forum/viewtopic.php?t=16574&start=0&postdays=0&postorder=asc&highlight= This quality only is the result of using Mitutoyo objectives instead of cheap Korean objectives :shock: ? I understand that Javier kn...

That wonderful detail! Is light years ahead of the resolution that I get ...

Someday I want to get images like this ....

OK, now I am aware I'm asking for a miracle. But it's fun: Want a Ferrari and pay € 200.000 has no secret. In a pair of weeks I think I'll have the objective in my house and I'll try, I'll try as far as it can get ...

A friend in this great forum has offered to buy it and send it to me. I will test it and post here the results. Although it is difficult to accept that for that price I can get the quality I seek (translating a well-known saying in Spain " Nobody give dollars for 80 cents"), the price is so cheap th...

I'm looking a cheap lens :oops: for x30 or better x40 into the chip. I have seen this on Ebay. Does anyone know? http://www.ebay.com/itm/JML-Optical-Lens-/290689689664?pt=Camera_Lenses&hash=item43ae74a840#ht_500wt_1247 The seller only ships to USA. Could any friend from USA send it to me to Spain? O...

CCD or CMOS sensors are highly sensitive to infrared. So much so that to achieve accurate color reproduction camera makers put a IR cut filter in front of the chip. Like many celestial objects emit far infrared radiation, many amateur astronomers are modifying their SLR by removing the cut filter an...

rjlittlefield wrote: The JML 20X ...but it's much less expensive.

This phrase is music to my ears

Thanks, Rik I own the JML 26mm f 4.5 lens and perhaps offered to me a little small increase. I have a Nikon x20 LWD also but sometimes its working distance is small for to take pictures of minerals, because small quality crystals are protected in geodes. For this reason I follow with interest the th...

Hey. I have a JML objective. I have done some testing of distance between the lens and the chip of my camera, some tests clearly excessive (more than 30 cm.) But I don´t know which is the proper distance to work with the best quality possible that this objective can offer. Does anyone know the recom...

I have several lamps from IKEA. My lamps with base have different color temperature that my clamp lamps. I think IKEA is not too concerned about perfect color reproduction and uses different LED's in each production, so that, for me, is absolutely necessary to perform a custom white balance with a w...

I do not know where is the idea of ​​importing a lot to Europe. I see that the auction is ended and I do not know if there are more lots. But if someone is going to import a lot to Europe I continue interested in an objective. I'll be on a trip the last two weeks of this month, but when ...