This is a convenient photography adapter/holder for attaching a smartphone to telescopes, microscopes, spotting scopes, binoculars, etc. As shown in the fourth photo, it can hold devices like an iPhone 11 (with a case) and an iPhone 15 Pro (with a case). It's quite convenient that you don't have to remove the case every time. Compatible eyepiece size: 25mm - 48mm Compatible smartphone size: 55mm - 100mm Body size: 15 x 6 x 5.5 cm Weight: Approximately 102g There is a camera mounting screw hole (UNC1/4) on the bottom of the body, allowing for use with a tripod. [VIXEN R130S Reflector] The first moon photo ① was taken on 2025/9/1 with this adapter and an Android smartphone. [VIXEN A80MF Refractor] The first moon photo ① was taken on 2023/9/4 and Saturn photo ② was taken on 2023/9/9 with this adapter and an Android smartphone using a VIXEN A80MF. [MEADE EQM-127 Reflector] The next moon photo ③ was taken on 2022/10/31 with an Android smartphone using a MEADE EQM-127, which cost tens of thousands of yen at the time. [Vixen Space Eye 700 Refractor] The next total solar eclipse photo ④ was taken on 2022/11/8 with an iPhone using a Vixen Space Eye 700. This was a complete total lunar eclipse, the first in 400 years, so the moon appears reddish. You can easily take photos like this with this adapter. [R-80S Reflector, Vixen Space Eye 70M Refractor] The last two moon photos are photos taken with an Android smartphone: photo ⑤ taken with a Halley Multi R-80S on August 5, 2023, near a supermoon, and photo ⑥ taken with a Vixen Space Eye 70M on 2023/10/23. The supermoons (full moons that appear larger than usual) in 2025 will be on 10/7, 11/5, and 12/4. How about it? Especially 11/5 will be the largest this year. The following stargazing guide explains this year's astronomical events clearly: https://www.astroarts.co.jp/alacarte/index-j.shtml Astronomy telescope, telescope, adapter, holder, mounter