Photography Asked on May 16, 2021
My young daughter is excited about photography, so I bought her an entry level camera for her birthday. There are two problems:
(1) She likes doing close up pictures, and the camera is a fixed focus one.
(2) I don’t know how to determine what standard the threads on the camera are.
The camera is a Sereer, ASIN B08JCFDBZX.
There are some threads on this camera, and so I tried out some optics from my older digital Kodak and the radius of the fitting was different.
So my question is, how can I locate a compatible close-up lens?
Any help would be appreciated.
It appears the filter diameter of that camera is 52 mm. The image of the camera at the Amazon product page says "52mmW". I don't know what the "W" indicates, but the 52mm is probably the filter thread diameter.
Additionally, one of the other product images says "52mm Screw Connection for UV Filter (not included)".
Regarding selecting an appropriate close-up filter, you have to determine how close your daughter wants to get to the subject. Close-up filters are specified in diopters, usually from +1 to +10. The diopter value is just the inverse of the close-up filter's focal length, which also happens to be maximum focus distance, in meters, when the diopter is installed. So a +1 diopter has a focal length of 1 meter; +2 diopter corresponds to 0.5 meter; +10 diopter corresponds to 0.1 meter.
Now, without getting into too much optics detail, generally speaking, close-up lenses work better with longer focal-length lenses. The focal length of your daughter's camera is either F=2.4mm or f=5.04mm (printed on the front of the camera). In either case, it's a very short focal length compared to typical diopters you'll be able to find, which only go up to about +10 for consumer gear. So while a close-up lens will allow (actually, require) her to get closer to the objects to photograph them, she probably won't see very much magnification. However, close-up lenses are fairly inexpensive to get into, so I wouldn't discourage the effort. After all, part of the experience of photography is trying things that don't work as well as you expected.
See also the related question, How can I calculate the effect of a supplementary close-up lens (a.k.a macro filter)?
Correct answer by scottbb on May 16, 2021
The camera-to-subject distance of a non-adjustable camera is set to what is called the “Hyperfocal” distance. Such a setting yields a zone of acceptable sharpness, likely about ¾ meter (30 inches) to infinity ∞.
Mounting a close-up lens is a good and inexpensive way to work in closer. Close-up lenses are cousins of the lenses used in store-bought reading eyeglasses. In other words, you could buy a pair of +3 reading eyeglasses, dislodge one of the lenses and mount it with masking tape over the camera lens. Such a lash-up might prove to be satisfactory for your application. Of course, a photo grade close-up is preferred. They come in a single and double element design. The double element arrangement corrects for chromatic aberration. This shows itself as a rainbow fringe at the edges of objects.
The labeling of these lenses is based on the language of the optician. This is a unit of power called the “diopter”. This unit is useful because, when combining lenses, we can simple add up the diopter powers to get the power of a combination.
Anyway, a number 3 (+3) close-up shifts the close focus 1/3 = 0.333 X 1000 = 333mm = 13 inches. You can buy a +3 reading eyeglass and hold or tape it over the lens. Likely this will work out just fine.
If you combine the two +3 lenses the result is +6. Now 1/6 = 0.167 x1000 = 167mm = 6.5 inches.
OK – this math tells us the revised point of focus, most forward-facing lens to subject distance.
Answered by Alan Marcus on May 16, 2021
Uh, no. The previous answers are a little off.
The lens on the camera you bought appears to be a "close-up" lens. See the word "MACRO" on the lens? That's the term we use for "close-up" photography. It means the lens is capable of very close minimum focal distance; very basically, the closer you can scooch the lens to the subject and still maintain focus, the more magnification you'll see in your images. If I'm not mistaken, that's what your daughter is attempting to achieve.
It doesn't look like the lens is removable; ie, it's not what we call an interchangeable lens camera, like, say, a DSLR or mirrorless camera. So it's permanently attached and not swappable. But it says macro, and the minimum focal distance might produce enough magnification for her.
Answered by pro photog on May 16, 2021
It looks like the lens does not come off, however the product page states it IS threaded for a filter. Normally the last number on the lens proceeded by Ø is the filter size. This should allow you on the cheap to take up close "macro" shots with the camera you have. You simply unscrew the larger half of the lens and keep the smaller half on the camera. Or This set That would let you pick how much macro zoom you have. I went the first route for my DSLR and got ok results. When you decide to upgrade keep in mind most point and shoot style cameras wont accept a filter. But around 2x zoom can get you close.
Answered by billy101456 on May 16, 2021
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