Good for starry sky shooting at snowy mountains

■ Senjojiki December curl (2600 m) minus 20 ° C Humidity is not particularly problematic under a small environment ■ No particular problem with the one in Yokoteyama at the top of January (2300 m) minus 15 ° C Using a heater under 90% humidity Other cameras freeze. This lens with one heater also condensed and froze so it was okay to use it with two other heaters. It is mainly used in the α7 series, but the combination of SEL 28F2 + SEL 057 FEC can be used with the very long length. Although COSPA is very good, it is good to use it if the length is long and the width is a bit short.

Strong ally of winter astrophotography

In the past I was sticking Cairo of Kiriwashi, but this is good because it will warm the lens / lens barrel uniformly. Cost performance is also the best. It was used at the summit of Ohnoyama with the Inagawa Observatory (Hyogo Prefecture) for photographing the Gemini meteor shower (December 13). The snow was piled up about 5 cm and it was in a state of falling strongly occasionally (the temperature was probably around minus 5 degrees), but the lens never fogged. Removing it during shooting and touching the lens barrel makes it slightly warmer and there is no worry that the equipment will be adversely affected by too hot. Also, since it is a product that generates heat, I will eat the battery. Four indicators became one within 2 hours using a mobile battery (iPhone can fully charge twice) 6700 mAh made by Anchor. If batteries of the same capacity in a low temperature environment, it probably has Max for 3 hours. Even though the lens barrel is thick and it exceeds the adhesion range of the Velcro tape, I think that there is no problem if pasting it with permacel tape or the like. Permacell can also be used to fix the focus position, and the battery can also be affixed to the tripod with permacell.

This is good!

I bought it for E-m1. Although it is originally a lens heater, it can be used to warm the battery of the main unit. You can push only the shutter button looking vertically on the grip part. Although it is different from the original way of use, is this a kore good?

Products considered

I tried to disassemble the structure concerned. Probably neoprene on the outside has been devised to enhance the heat retention effect. Also, the Velcro strap is strongly tightened so that it can be wrapped firmly. In the heater part, a bundle of thin fibers such as carbon fiber spread widely in a lattice shape, and seems to be warming the whole balance well.

It is cheap but it can be used as it is

It is cheap, but if you connect a USB battery, it will generate heat as it is, so I think that it can be used to prevent the fogging of the lens, such as during night sky shooting. Since there is a reasonable length of the USB cable, I think that it will be stable if you fix the battery with a duct tape etc. to the foot of the tripod.

Convenient for taking time lapse in the starry sky

Because of the unexpected width, it will protrude as a short lens. In that case it solved by double folding. It is useful not to catch the night dew with time lapse shooting. Connected to anchor's 10,000 mA mobile battery, I took at least 6 hours of shooting.

Very satisfied!

It is an essential item when taking a star. If you put a large capacity 2 port battery in the included case and put it on a tripod, you can drive both heater and pot red efficiently.

No complaints.

I planned to use it in the star shot in March, it was cold and rolled around my own arm. Hokaron will also become an alternative.